Hi-
3dMVM and 3dLME seem to be compatible with a number of R versions. I woudl expect R v3.3 or 3.4 would be fine for those.
Other/newer programs (such as MBA and RBA) might require newer R version. *However*, we have had trouble with installation for those, so at the moment I wouldn't upgrade just to upgrade (we have to contact the authors of a particular package for assistance in their very new/different version).
So, if your programs are working, then I wouldn't upgrade just to upgrade.
--pt