OO vs. OO-pro files
 

I have full licenses for both OO and for OO-pro.
I've switched to using OO-pro, but my question is if I wanted to could I go back to using OO and open my *.003 files from OO-pro without any harm?

i.e., does OO-pro in any way alter the old OO data *.003 files?

Files made with OO Pro are fully compatible with the standard version. Features in pro that alter output/content (such as styles, or custom headers) will just not be editable in the standard version but will preserve them.

Let me know if you have anymore questions!