diff --git a/Readme.md b/Readme.md
index 3344a2a..83d5c7f 100644
--- a/Readme.md
+++ b/Readme.md
@@ -27,7 +27,7 @@ It has the standard Moodle Capability-Checks built-in, so there are no extra cap
   * Log in as the selected user
 
 ## Prerequisites
-* This version is tested on Moodle 4.0, 4.1, 4.2, 4.3 (branch master and moodle_4_dev, without a link in navigation), 3.10, 3.11 (branch 310)
+* This version is tested on Moodle 4.0, 4.1, 4.2, 4.3, 4.4 (branch master and moodle_4_dev, without a link in navigation), 3.10, 3.11 (branch 310)
 * For Moodle 3.9 and older use v1.03
 * It is highly recommended to activate compression to reduce transmitted data (e.g. from 4.36MB to 1.05 MB)
   * Add "zlib.output_compression = On" in php.ini
diff --git a/classes/external.php b/classes/external.php
index 69da7a0..be2c740 100644
--- a/classes/external.php
+++ b/classes/external.php
@@ -56,14 +56,14 @@ class external extends external_api {
     public static function create_new_course_parameters() {
         return new external_function_parameters(
             [
-            'shortname' => new external_value(PARAM_TEXT, 'The short name of the course to be created'),
-            'fullname' => new external_value(PARAM_TEXT, 'The full name of the course to be created'),
-            'visible' => new external_value(PARAM_BOOL, 'Toggles visibility of course'),
-            'categoryid' => new external_value(PARAM_INT, 'ID of category the course should be created in'),
-            'activateselfenrol' => new external_value(PARAM_BOOL, 'Toggles if self_enrolment should be activated'),
-            'selfenrolpassword' => new external_value(PARAM_TEXT, 'Password of self enrolment'),
-            'startdate' => new external_value(PARAM_TEXT, 'Course start date'),
-            'enddate' => new external_value(PARAM_TEXT, 'Course end date'),
+                'shortname' => new external_value(PARAM_TEXT, 'The short name of the course to be created'),
+                'fullname' => new external_value(PARAM_TEXT, 'The full name of the course to be created'),
+                'visible' => new external_value(PARAM_BOOL, 'Toggles visibility of course'),
+                'categoryid' => new external_value(PARAM_INT, 'ID of category the course should be created in'),
+                'activateselfenrol' => new external_value(PARAM_BOOL, 'Toggles if self_enrolment should be activated'),
+                'selfenrolpassword' => new external_value(PARAM_TEXT, 'Password of self enrolment'),
+                'startdate' => new external_value(PARAM_TEXT, 'Course start date'),
+                'enddate' => new external_value(PARAM_TEXT, 'Course end date'),
             ]
         );
     }
@@ -418,7 +418,7 @@ public static function get_user_information($userid) {
         $context = \context_system::instance();
         if (\has_capability('moodle/user:loginas', $context)) {
             $link = $CFG->wwwroot . "/course/loginas.php?id=1&user=" . $data['userinformation']['id'] . "&sesskey="
-            . $USER->sesskey;
+                . $USER->sesskey;
             $data['loginaslink'] = $link;
         } else {
             $data['loginaslink'] = false;
@@ -909,7 +909,7 @@ public static function get_course_info($courseid) {
 
         // Get information about the course.
         $select = "SELECT c.id, c.shortname, c.fullname, c.visible, c.timecreated, c.startdate, cat.path FROM {course} c, " .
-                  "{course_categories} cat WHERE c.category = cat.id AND c.id = " . $courseid;
+            "{course_categories} cat WHERE c.category = cat.id AND c.id = " . $courseid;
         $coursedetails = $DB->get_record_sql($select);
         $coursedetails = (array)$coursedetails;
         if ($coursedetails['timecreated'] == 0) {
@@ -1117,8 +1117,8 @@ public static function get_course_info_returns() {
             'rolesincourse' => new external_multiple_structure(new external_value(PARAM_TEXT, 'array with roles used in course')),
             'roles' => new external_multiple_structure(
                 new external_single_structure([
-                'roleName' => new external_value(PARAM_RAW, 'name of one role in course'),
-                'roleNumber' => new external_value(PARAM_INT, 'number of participants with role = roleName'),
+                    'roleName' => new external_value(PARAM_RAW, 'name of one role in course'),
+                    'roleNumber' => new external_value(PARAM_INT, 'number of participants with role = roleName'),
                 ])
             ),
             'users' => new external_multiple_structure(
@@ -1132,20 +1132,20 @@ public static function get_course_info_returns() {
                     'enrol_id' => new external_value(PARAM_INT, 'id of user enrolment to course'),
                 ])
             ),
-                'activities' => new external_multiple_structure(
-                    new external_single_structure([
+            'activities' => new external_multiple_structure(
+                new external_single_structure([
                     'section' => new external_value(PARAM_RAW, 'Name of section, in which the activity appears'),
                     'activity' => new external_value(PARAM_RAW, 'kind of activity'),
                     'name' => new external_value(PARAM_RAW, 'Name of this activity'),
                     'visible' => new external_value(PARAM_INT, 'Is the activity visible? 1: yes, 0: no'),
-                    ])
-                ),
-                'links' => new external_single_structure([
-                    'settingslink' => new external_value(PARAM_RAW, 'link to the settings of the course'),
-                    'deletelink' => new external_value(PARAM_RAW, 'link to delete the course if allowed, '
-                        . 'additional affirmation needed afterwards', VALUE_OPTIONAL),
-                    'courselink' => new external_value(PARAM_RAW, 'link to the course'),
-                ]),
+                ])
+            ),
+            'links' => new external_single_structure([
+                'settingslink' => new external_value(PARAM_RAW, 'link to the settings of the course'),
+                'deletelink' => new external_value(PARAM_RAW, 'link to delete the course if allowed, '
+                    . 'additional affirmation needed afterwards', VALUE_OPTIONAL),
+                'courselink' => new external_value(PARAM_RAW, 'link to the course'),
+            ]),
             'enrolmentMethods' => new external_multiple_structure(
                 new external_single_structure([
                     'methodname' => new external_value(PARAM_TEXT, 'Name of the enrolment method'),
@@ -1154,8 +1154,8 @@ public static function get_course_info_returns() {
                     'password' => new external_value(PARAM_TEXT, 'Password for enrolment method'),
                 ])
             ),
-                'isallowedtoupdatecourse' => new external_value(PARAM_BOOL, "Is the user allowed to update the course globally?"),
-                'wwwroot' => new external_value(PARAM_TEXT, "Root URL of this moodle instance"),
+            'isallowedtoupdatecourse' => new external_value(PARAM_BOOL, "Is the user allowed to update the course globally?"),
+            'wwwroot' => new external_value(PARAM_TEXT, "Root URL of this moodle instance"),
         ]);
     }
 
@@ -1222,7 +1222,7 @@ public static function get_assignable_roles($courseid) {
         }
 
         $data = [
-        'assignableRoles' => (array)$arrayofroles,
+            'assignableRoles' => (array)$arrayofroles,
         ];
 
         return $data;
@@ -1376,7 +1376,6 @@ public static function duplicate_course_parameters() {
      * @throws invalid_parameter_exception
      */
     public static function duplicate_course($courseid) {
-        // TODO
         // Check parameters.
         $params = self::validate_parameters(self::duplicate_course_parameters(), ['courseid' => $courseid]);
         $courseid = $params['courseid'];
@@ -1394,15 +1393,15 @@ public static function duplicate_course($courseid) {
         $newshortname = $oldcourse["shortname"] . " - duplicated" . rand(0, 1000); // Add random number to avoid shortnametaken.
 
         $options = [
-             ['name' => 'activities', 'value' => 1],
-             ['name' => 'blocks', 'value' => 1],
-             ['name' => 'filters', 'value' => 1],
-             ['name' => 'users', 'value' => 0],
-             ['name' => 'role_assignments', 'value' => 0],
-             ['name' => 'comments', 'value' => 0],
-             ['name' => 'userscompletion', 'value' => 0],
-             ['name' => 'logs', 'value' => 0],
-             ['name' => 'grade_histories', 'value' => 0],
+            ['name' => 'activities', 'value' => 1],
+            ['name' => 'blocks', 'value' => 1],
+            ['name' => 'filters', 'value' => 1],
+            ['name' => 'users', 'value' => 0],
+            ['name' => 'role_assignments', 'value' => 0],
+            ['name' => 'comments', 'value' => 0],
+            ['name' => 'userscompletion', 'value' => 0],
+            ['name' => 'logs', 'value' => 0],
+            ['name' => 'grade_histories', 'value' => 0],
         ];
 
         $newcourse = \core_course_external::duplicate_course(
diff --git a/lang/en/tool_supporter.php b/lang/en/tool_supporter.php
index f782af6..3b9c086 100644
--- a/lang/en/tool_supporter.php
+++ b/lang/en/tool_supporter.php
@@ -21,52 +21,42 @@
  * @copyright  2019 Benedikt Schneider, Klara Saary
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-$string['toolsupporter'] = 'toolsupporter';
-
+$string['beingduplicated'] = "The course is being duplicated. This may take a while.";
+$string['enable_selfenrolment'] = 'Activate self enrolment and set password';
+$string['level'] = 'Level';
 $string['pagetitle'] = 'Moodle-Supporter';
-$string['pluginname'] = 'Supporter';
 $string['plugincategory'] = 'Supporter';
-$string['level'] = 'Level';
-$string['enable_selfenrolment'] = 'Activate self enrolment and set password';
-
-$string['beingduplicated'] = "The course is being duplicated. This may take a while.";
-
-$string['searchcourses'] = 'Search';
+$string['pluginname'] = 'Supporter';
+$string['privacy:metadata'] = 'This plugin does not save user-specific data, only global settings.';
 $string['refreshcourses'] = 'Refresh';
-$string['searchusers'] = 'Search';
 $string['refreshusers'] = 'Refresh';
-
-// Strings for setting page - settings.php.
-$string['sett_title'] = 'Supporter configuration';
-$string['sett_levels'] = 'Labeling of course category levels';
+$string['searchcourses'] = 'Search';
+$string['searchusers'] = 'Search';
+$string['sett_course_detail_showrolesandamount'] = 'Show all roles and their amount';
+$string['sett_course_detail_showrolesandamount_desc'] = 'Explicitly shows all roles and their amounts in a seperate table row per role, i.e. amount of teachers, amount of students, etc.';
+$string['sett_course_details'] = 'Course details';
+$string['sett_course_details_desc'] = 'The course details are shown in the top left when a course is clicked.';
+$string['sett_course_table'] = 'Course table';
+$string['sett_course_table_desc'] = 'The course table lists all courses and is displayed in the bottom left.';
+$string['sett_course_table_pagelength'] = 'The amount of courses shown';
 $string['sett_enable_lvl_1'] = 'Enable Level 1';
 $string['sett_enable_lvl_2'] = 'Enable Level 2';
 $string['sett_enable_lvl_3'] = 'Enable Level 3';
 $string['sett_enable_lvl_4'] = 'Enable Level 4';
 $string['sett_enable_lvl_5'] = 'Enable Level 5';
+$string['sett_levels'] = 'Labeling of course category levels';
 $string['sett_levels_default'] = 'L1;L2;L3;L4;L5';
 $string['sett_levels_description'] = 'Specify the displayed names of the course levels. In descending order (uppermost level first) and separated by semicolon. ';
-
-$string['sett_course_table'] = 'Course table';
-$string['sett_user_table'] = 'User table';
-$string['sett_user_details'] = 'User details';
-$string['sett_course_details'] = 'Course details';
-
-$string['sett_course_table_desc'] = 'The course table lists all courses and is displayed in the bottom left.';
-$string['sett_course_table_pagelength'] = 'The amount of courses shown';
-$string['sett_user_table_desc'] = 'The user table lists all users and is displayed in the bottom right.';
-$string['sett_user_table_pagelength'] = 'The amount of user-courses shown';
-$string['sett_sort_course_table'] = 'Sorting of the ID-Column in course table';
+$string['sett_never'] = 'never';
 $string['sett_sort_course_details'] = 'Sorting of the ID-Column in course view (enrolled users)';
-$string['sett_sort_user_table'] = 'Sorting of the ID-Column in user table';
+$string['sett_sort_course_table'] = 'Sorting of the ID-Column in course table';
 $string['sett_sort_user_details'] = 'Sorting of the ID-Column in user view (enrolled courses)';
+$string['sett_sort_user_table'] = 'Sorting of the ID-Column in user table';
+$string['sett_title'] = 'Supporter configuration';
+$string['sett_user_details'] = 'User details';
 $string['sett_user_details_desc'] = 'The user details are shown in the top right when a user is clicked.';
-$string['sett_course_details_desc'] = 'The course details are shown in the top left when a course is clicked.';
-$string['sett_course_detail_showrolesandamount'] = 'Show all roles and their amount';
-$string['sett_course_detail_showrolesandamount_desc'] = 'Explicitly shows all roles and their amounts in a seperate table row per role, i.e. amount of teachers, amount of students, etc.';
-
-$string['sett_never'] = 'never';
+$string['sett_user_table'] = 'User table';
+$string['sett_user_table_desc'] = 'The user table lists all users and is displayed in the bottom right.';
+$string['sett_user_table_pagelength'] = 'The amount of user-courses shown';
 $string['strftimesecondsdatetimeshort'] = '%d/%m/%Y, %H:%M:%S';
-
-// Privacy API.
-$string['privacy:metadata'] = 'This plugin does not save user-specific data, only global settings.';
+$string['toolsupporter'] = 'toolsupporter';
diff --git a/settings.php b/settings.php
index 2635a1a..c67fdee 100644
--- a/settings.php
+++ b/settings.php
@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
  * Navigation and settings definitions.
  *
diff --git a/version.php b/version.php
index 30b2c99..a3cf590 100644
--- a/version.php
+++ b/version.php
@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
  * Plugin version info
  *
@@ -21,8 +22,8 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 defined('MOODLE_INTERNAL') || die();
-$plugin->version   = 2023121300; // The current plugin version (Date: YYYYMMDDXX).
+$plugin->version   = 2024082000; // The current plugin version (Date: YYYYMMDDXX).
 $plugin->requires  = 2022041900; // Requires Moodle version 4.0 or higher.
 $plugin->component = 'tool_supporter'; // Full name of the plugin (used for diagnostics).
-$plugin->release = 'v4-r3';
+$plugin->release = 'v4-r4';
 $plugin->maturity = MATURITY_STABLE;