I have just uploaded a new version of the GIMP AppImage, and updated the link in the Community Software page accordingly.
This new version comes with the following improvements:
- all packages updated to recent git sources
- G’MIC sources updated to post-1.7.6 version
- added the gutenprint plug-in
- (hopefully) improved integration with different distributions
Please let me know if you encounter any issues with this new version, that still has to be considered rather experimental…