I downloaded the 8 hour pro demo and my free sketchup is gone....
I read here somewhere that someone was using the free version to draw and the pro version to export files, etc.
Do I need to keep the two versions on separate computers?
thanks,
-mark.

I used to do that. and no...not two different computers....I had already installed the free version.....then downloaded and installed the demo pro version.

I do know they were installed in two different files so you might want to watch that when you are doing the installation so that one doesn't install over the other....

You should be able to change the install location without causing any issues

Ok, that was my case, I had the free version and the pro demo installed over top.
I think I get what you mean... install the pro demo into a different folder, will try that, thanks!