Snow Leopard stuck on Blue Screen after using AppCleaner
I have a Mac Desktop model iMac5,1 using Snow Leopard 10.6.3. Somehow I got the program for Genieo on my computer and every time I started up it asked if I wanted to use Genieo as my default browser. I searched online for a way to get rid of Genieo and found out how I could download the app AppCleaner and just drag and drop the Genieo file into it and all related files would be in a list with it and then you deleted it. As I pressed delete I saw that over 100 items were being deleted. Upon restarting my Mac it froze on the blue screen and would go no further. I did some research and was able to start up my Mac in Safe Mode but many vital programs don't work though I can get on the internet, access my files to back them up, and print. Before this my Mac was working fine. I guess that in deleting the files with AppCleaner I accidently deleted one that had to do with startup. Help!
iMac, Mac OS X (10.6.3), iMac5,1