Filter to enhance the quality of image

[rich2005]

Quote:...I haven't done anything on the OS - Ubuntu 22.04..

You sure of that ?

Try a run in a terminal and see what error messages show

But first, since it is a new download, check that the appimage is still executable.
then open a terminal where the appimage is.

Have your buddies in ubuntu forums convinced you to remove fuse ?

Code:

fusermount --version

should report version 2.9.9

If fuse is still there then try starting the appimage from the terminal (dot-slash-application)

Code:

./gimp-mathmap-22-04jammy.AppImage

What do you get ? Should look like this: https://i.imgur.com/yAXuSOw.mp4