Republishing captivate 9 files now with Captivate 10

hello all, I have published CP files developed with version 9 but now have CP v10 on my work network - with no choice on the matter! (grrr). When I make a change to these existing files, then attempt to republish with CP v10, I experience publishing errors. I have been advised that it is not an option to return back to V9. Is there any thing I can do to get these files republished without having to re-create from scratch?