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