Just installed nero 7 software

Question

just installed nero 7 software on my comp. and really messed up all my music files. all my saved files have lost there names & are know numbered tracks of nero media type. Same applys to media i connect. ie. cd or usb drive. I`ve uninstalled the program, no change. I`ve got hundreds of songs & midi files all messed up please help. I purchased the prog. just to make lightscribe labels?? Grant