okay, short update, I installed the newest version of the RM on my new macbook, it could open the backup which I assumed was older, but tbh I obviously didnt run any update for 4 years now 😂🤦🏼♂️
RM could read the pack, I exported the rigs, renamed them to .kipr and imported the good ones via my old macbook.
nevertheless I am considering to update both the profilerOS and the RM, guess we‘ll see when I post in 5years, still on os 3.x 😂