More problem reverting back to 1970

I deleted all instances of 3120 and reinstalled 1970. So far, so good.

But it won't let me re-install my guest OS.



Parallels Desktop is unable to operate properly since it cannot communicate with one of its drivers. Seems that drivers are inconsistent with the currently installed version of Parallels Desktop. To overcome this issue, reinstall Parallels Desktop and start it by selecting Finder->Applications->Parallels->Parallels.

I followed the steps above but I'm getting the same error message.

HELP!

 

Nevermind, I figured it out.

 

And what did you figure out?

 

How to re-install 1970. I use the uninstaller provided with 3120. It probably nuked some files I hadn't gotten to manually. That allowed me to run a clean install.

 

Thanks. (and some more for at least 10 characters...)