When I press the Playback button it doesn't play back. The error message I get is: "Finale's Audio engine failed. To load please restart. Finale error code 7"

Do I need to delete the program and redownload it? If I do need to how do I deauthorize? How do I redownload the program?
Finale version 26. Serial Number HFEA-9333Q JC35

Thanks!
Demetrios
email: d.kastaris@gmail.com
cell phone: (718) 343-3113