GNOME 3: how to ‘ungroup’ applications and window

I already read branch Okular instances does not group under single icon in desktop dock on Ubuntu 17.10

and I want to do some ‘reverse’ process. I want somehow two versions of qtCreator (stable and beta) to be independed. For example I run ‘qt creator beta’ but I see that GNOME caption is given from stable. Moreover, when I try to ‘Add To Favorites’ I ended up with adding of stable launch instead of beta one. I played a bit with both desktop files with no luck yet.