Take your time on testing! Make it real good.
But also since I mod a lot, recently I've been messing with Deso stuff, and found that the new mkps has been ... how do I put it nicely mmmm annoying. Especially when working on my old mac due to being away from home.
But at the same time there might be errors if the code has already been adapted to the newer mkps. Might just be mac issues since I haven't messed with it on my windows PC. So yeah, tbh I think using the old one might be better. Dunno what is wrong with the mkps, guess it just wants to be that one kid in class who stands on the desk and screams every 5 minutes.