Keeping older versions of krita

When I installed Krita 5, I saw the checkmark for the option of deinstalling the older version, but I couldn’t uncheck it, 'cause it was greyed out.
I really would like to keep the old (Krita 4) and the new version (Krita 5) on my PC without having to deinstall and reinstall everything to switch.
I know that’s gereally possible because I got two versions of another programm on my PC and they are both usable, even at the same time (!)

Using the portable zip version for that is the easiest option. I guess that you could also select a different installation path, and then you can have both versions, but I haven’t tried that – on windows, I always use the zip file version.

I would like the option by default
(it would be possible by naming the installers not just “krita (x64)” but with their respecting number for each big version, as far as I’m concerned)
I kept them by renaming my old version “krita 4 (x64)” so i can open them both at the same time.

I wonder how that would affect resource management/manipulation activities.

If it were possible to define a different resource folder before installing Krita 5, and the settings files could be placed in different folders, which is currently impossible without hacking Krita, ONLY THEN could it work permanently without any collision. The resource folder can be relocated after creating the “kritarc” of Krita 5, the rest cannot. Only separate users allow a SAFE separation, everything else is a botch!

Right now, all you can do is HOPE there’s no collision. Below you can read how to separate cleanly, but it has a single drawback, the second Krita is not accessible by drag and drop, everything must be fed via the menus “from the outside”, but I use this now for 8 months with up to 7 Versions of Krita simultaneously.

Michelist