[Zastava]

First one, the portable path with special://...

OK, thanks. I will need some time to fix this. Actually, now I'm not sure if it can be fixed... I can give you technicalities if you want.

If you can that would be great. Always willing to learn.

@Wintermute0110 I managed to find a fix/workaround for the issue, I think.
So, for art assets to be portable and always work good, the special://... is needed.
But for roms you get the duplicated issue everytime you add a new game to an existing launcher. The solution for the roms is using a normal portable (without special and so on) path in the launcher. This only works for roms, not art assets. Like this: ..\..\collections\Commodore Amiga\roms\...