If your pv+'s are pre-6 hardware, and you don't plan on upgrading them, then I strongly recommend you rehost your license for Studio onto your 32bit VM. Just stay away from FactoryTalk and 64bit. It's a can of worms you just don't want to open. Unless you never plan on modifying the programs on your version 5 firmware terminals, then don't develop in the 64bit OS. You won't be able to restore a mer or apa. So if you ever lose the development project, you're hosed. You can work around by keeping > 6.0 runtime versions to restore from and lower versions of the same files to run on your terminals, but that's a real PITA.
From what I gather, RA not only still has no fix for this issue, but they don't PLAN on fixing it either. I think they are trying to strong-arm everyone into upgrading all their units. But at $2k+ per unit for a logic module upgrade, it's too expensive a sell for the bean counters at most companies when the only real upside is 64bit OS compatibility.