I saw the update notice for 3.2, thanks! So I downloaded it, dragged it to my "Second" hard drive's "Applications" folder, and started it up.
It asked if I had a previous RubyMine installed to get settings from, and I do, so I clicked the "browse to find it" button. This almost worked... however, it would only show me my "Main" drive. I had to make a soft link from my home to get there (though I could have cancelled the find-the-directory dialog and entered the path by hand).
Not everyone uses their "Main" drive for all applications... it would be nice to choose a different volume.