I've been using the 1.5 64bit since forever. With the new MPR tool, I wanted to try out 2.0. I installed the 2.0 64bit version, but unless I'm blind or something, I can't find the MPR tool.
So I uninstall it and installed the latest 32bit build. It crashes outright with an "Unable to Query server My Studies: An error occurred while performing the study root query."
This was on a Windows 7 64bit system.
Never had that problem before, even on a 32bit system.