Lost shared file
 

I accidentally deleted or lost the shared file in my library. When I go into my Library, the shared file is not there. Now that it si gone, when i download sons it sasy it can not move to library. I have treid reinstalling the program many times to see if it would return back to normal, but it doesnt. I have serached for it many times and cant find it, so I think I deleted it. Is there a way to get it back or put in a new one? Or is there a way that I could jsut get a fresh program and start over? I need major help!! Thanks!