I am using GIMP 2.10.24 (Flatpak) with GMIC Flatpak Plugin on Ubuntu 18.04 LTS.
My GMIC plugin occasionally vanishes from GIMP Filters menu. Last time it did that I just reinstalled flatpak and it turned up again.
Where do GIMP flatpak plaugins reside, and does the GIMP → preferences → Folders have to point to those folder?
That was the rule when I was using GIMP from the official Ubuntu repository. But when I moved to flatpaks, I am not sure if the same rule applies (because flatpak is a sandboxed???) I am not a techie, but have some knowledge of CLI. I read a post somewhere that GIMP flatpak plug-ins like GMIC, Resynthesizer, Liquid Rescale etc. are now installed by default with flatpak GIMP. But could not find a clear description of where GIMP flatpak plugins are located and what changes (if any) are needed in GIMP flatpak preferences/folders to use them.