Dear Sherri
Please could you let us know which version of Photoshop you are using and whether the extensions menu is now greyed out? If you used Adobe add-ons to download your products, it will be easy to reinstall them directly from the 'My Add-ons' link on the left-hand side of the add-ons website: creative.adobe.com/addons.
If, however, you are a CS6 user and use Adobe Exchange to obtain products for Photoshop, the 'My Stuff' section of the panel, as well as Extension Manager, will give you an indication of what should and shouldn't be currently installed in your copy of Photoshop.
Kind regards
Krystal
-Adobe Exchange / Addons team