@GIMP Good to hear!
I found appimage news too, and tried it. It would run and crash on my system, and it's not clear where to post feedback?
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(org.gimp.GIMP.Continuous:5034): GLib-GIO-ERROR **: 10:37:17.484: Settings schema 'org.x.apps.favorites' is not installed
/tmp/.mount_GIMP-3PoGIGD/usr/lib/x86_64-linux-gnu/gimp/3.0/plug-ins/script-fu/script-fu: fatal error: GIMP crashed
(script-fu:5685): LibGimp-WARNING **: 10:37:18.326: script-fu: gimp_flush(): error: Broken pipe