I did something that should not be done. I hid my entire Perseus collections. 
I didn't know that unhiding would be something that is a one-at-a-time process to unhide them. Could somebody help me to come up with some kind of solution? If I unhide one book, there is a delay as it works with the library. If I were to repeat this process for the 1000+ books, well, you get the idea...
Any solutions? Can I uninstall and then re-install? Is this the only solution? Would that work?
Future upgrade idea: Unhide All button in Preferences right there above the list of hidden resources.
Thanks to anyone who could shed some light on this matter.
Chris