I had a freeze in RH9 and after force closing and relaunching, I got a message that the .cpd file was corrupt and needed to be deleted. I deleted the entire project folder in my local drive and then retrieved the files from Visual Source Safe. When I tried to launch the .xpj file from Windows Explorer, RH launches to the splash page, but never moves beyond that. When I try to open from the Start menu short cut, RH launches but none of the project folders or files are there.
Emptied the local folder and retrieved files multiple times, but no change. Logged out completely and restarted the machine and no change.
Can you open one of the sample projects? If so, then something's gotten messed up in your VSS project; if not, then your RH install may be damaged.
I can open other RH projects, just not this one.
So try checking it out again, trash the .cpd file and then try opening it