@foto the documentation explicitly says where to put color profiles and which profiles are supported, and your screenshot shows an explicit button, highlighted in yellow, used to point RawTherapee to the folder containing color profiles, so what is the problem? Have you read the documentation?
Yes I have, but that doesn’t mean that I understood it.
I use the RT5.5 appimage and it doesn’t read the profiles from: /usr/share/rawtherapee/iccprofiles like RT5.4 used to.
In RT5.4 I was able to do both (as far as I remember), specify the screen calibration directory with my profile and it also read the /usr/share/rawtherapee/iccprofiles for the printing and that’s why I asked…
The text you pasted is from a section titled “Adding Custom Working Profiles” - a printer profile for soft-proofing is not a working profile. The text also says “when installed using your package manager(…)” - an AppImage is not installed using your package manager. See the link in the first point in the text you pasted for where to store printer profiles.
System wide profiles should be under $XDG_DATA_DIRS/color/icc/, while user specific profiles should be under $XDG_DATA_HOME/color/icc/. I’ve no idea if RT is actually following these conventions though…