Build 3094 & 3120 unexpectedly quit...problem reverting back to 1970

The last two beta builds have been just too unstable. I tried to re-install 1970 but the I can't complete the installation. After confirming I do wan to install an older version, the 1970 installer tells me there is "nothing to install".


???

 

Try uninstalling what you have. Then reboot. Then crawl your drive looking from remnants of Parallels and delete them. When you're sure you have removed everything then try to install 1970 again. If it complains it probably means you haven't scrubbed the earlier versions. Welcome to beta testing.

 

That would delete my VM then, wouldn't it? Problem is that I have an access database in my guest OS. I'd need to make a backup prior if everything is going to be deleted.