Lost my Plug-ins

I have somehow lost my Universal Audio and SSL plug-ins in Nuendo 5.5.2. I can use the plugs that came with Nuendo but anything outside of that I can’t run. I can open them in Inserts in the Inspector, but they don’t operate.

I am on a MacPro 8 core with max RAM running Lion 7.03 with latest updates.

Thanks for any suggestions.

Jon Frost

Have you recently changed to 64 bit?