.prj compatibility issues OS2 > OS2XL

Just installed OS2XL, opened an OS2 project and noticed that the duration settings - respectively Release Time (R) in GPE - for Samples played back with enabled Loop/AltLoop enabled is set to 0, so that looping is actually turned off. Not turned OFF in the sense, that is disabled in Trim Mode, but just that the Looping doesn't repeat and fade out - there's just no repetition of the looped area at all.

I've got the problem that the 16 levels set to tune isn't working on at least some of my previous projects :/. Guess I'll need to keep OS2 around for when I want to work on some of those projects.