So I set up a complete dummy site with my own dummy content for clients to use as a base for setting up a new site.. I set up a new Concrete5 install.. and then imported the database from the one I had backed up. Everything worked great accept one thing.. I had a couple of free add-ons on the database I imported.. and now they show as installed on my add-ons page.. but they're not available when I click on them. I get this error when I try and insert them onto the page..

Unable to load the controller for this block type. Perhaps it has been moved or removed.

A. How can I fix this..

B. If I can't fix it.. How can I at least delete the add-ons that are in there and re-install them?