Quote - Checked resent posts on the Eon forum and a couple of people said that they copy their entire Vue 9 library into the Vue 10 library and tell it not to overwrite. That way all their content is in one library.  That would be the ideal, but I want to be sure this won't cause problems. Has anyone here tried that?

I think this method should work just fine too.  This way, you'd retain the most recent version of an object/material/atmosphere etc. but still add items you have purchased and placed in your Vue 9 library.