No more 256-color input failing! The app will quantize input image to 256 color if needed now.
Also, binary for Linux and OSX is added. All 3 binary files require .NET 6 installed though.
On OSX/Linux do a chmod +x filename then run it with ./filename, replacing filename with the name of the downloaded file.
Enjoy!
p/s: I have no idea why linux binary is so heavy. Help appreciated.