Fix for issue 7641: Wrong path to TeXstudio (#7664)

* Fix the issue 7641

* improve the function used and remove useless output

Co-authored-by: Christoph <siedlerkiller@gmail.com>

CHANGELOG.md

@@ -80,6 +80,7 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We fixed an issue with opacity of disabled icon-buttons [#7195](https://github.com/JabRef/jabref/issues/7195)
 - We fixed an issue where journal abbreviations in UTF-8 were not recognized [#5850](https://github.com/JabRef/jabref/issues/5850)
 - We fixed an issue where the article title with curly brackets fails to download the arXiv link (pdf file). [#7633](https://github.com/JabRef/jabref/issues/7633)
+- We fixed an issue with the default path of external application. [#7641](https://github.com/JabRef/jabref/issues/7641)
 - We fixed an issue where urls must be embedded in a style tag when importing EndNote style Xml files. Now it can parse url with or without a style tag. [#6199](https://github.com/JabRef/jabref/issues/6199)
 - We fixed an issue where the article title with colon fails to download the arXiv link (pdf file). [#7660](https://github.com/JabRef/issues/7660)
 

src/main/java/org/jabref/gui/desktop/os/Windows.java

@@ -2,6 +2,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Optional;
 
@@ -27,13 +28,34 @@ public void openFile(String filePath, String fileType) throws IOException {
     @Override
     public String detectProgramPath(String programName, String directoryName) {
         String progFiles = System.getenv("ProgramFiles(x86)");
-        if (progFiles == null) {
-            progFiles = System.getenv("ProgramFiles");
+        String programPath;
+        if (progFiles != null) {
+            programPath = getProgramPath(programName, directoryName, progFiles);
+            if (programPath != null) {
+                return programPath;
+            }
         }
+
+        progFiles = System.getenv("ProgramFiles");
+        programPath = getProgramPath(programName, directoryName, progFiles);
+        if (programPath != null) {
+            return programPath;
+        }
+
+        return "";
+    }
+
+    private String getProgramPath(String programName, String directoryName, String progFiles) {
+        Path programPath;
         if ((directoryName != null) && !directoryName.isEmpty()) {
-            return Path.of(progFiles, directoryName, programName + DEFAULT_EXECUTABLE_EXTENSION).toString();
+            programPath = Path.of(progFiles, directoryName, programName + DEFAULT_EXECUTABLE_EXTENSION);
+        } else {
+            programPath = Path.of(progFiles, programName + DEFAULT_EXECUTABLE_EXTENSION);
+        }
+        if (Files.exists(programPath)) {
+            return programPath.toString();
         }
-        return Path.of(progFiles, programName + DEFAULT_EXECUTABLE_EXTENSION).toString();
+        return null;
     }
 
     @Override