Sounds like you will have to load them again, must have lost the plugin list in the installation, if you installed over 2010. If not, then you will have to load them into 2011,

Go to the FX area and scroll to the bottom, where you will see 'Add VSTi FX'
Then browse to the dll file for the plugin.
Once located they will be stay in the list.


I do not work here, but the benefits are still awesome
Make your sound your own!