This is from one of my Beta testers.
"First and the most grave thing, I can't install it, I don't know if this has been happening since you updated the engine to use XNA 4 or just with the most recent update, on win vista when I try to install VRS it says it can only be installed on systems with XNA 4, I have XNA 4; I tried installing it on a machine running on windows 7 and in that one I can't even install XNA 4 because it says it's already part of the system, but VRS setup says XNA 4 is not installed."
I am using the current freeware version.