Administrative Interfaces Missing

I used to have a lot of tabs under settings for various plugins like Breadcrumbs NavXT, wp-cache, and whatnot. Today I was playing around with a couple different photo galleries to see which solution worked best for me. I installed nextGen and didn’t like it so I used its uninstall and then deactivated and deleted it. I then installed aNiga.

For some reason, now all my Administrative Interfaces are missing from Settings. I tried deactivating and deleting aNiga, but nothing happened. I don’t know which change caused this, but I don’t really understand how it could have happened. I’m leaning towards perhaps nextGen deleting some SQL entries it wasn’t supposed to when uninstalling. Anyone have any ideas?