Ok, chill MrSAK
If there is a BB reference already in the File Types list - delete it, then restart Windows. Now after the restart, enter the File Types list again and make sure it's gone. Then try registering the file with New again.
If there is a BB reference already in the File Types list - delete it, then restart Windows. Now after the restart, enter the File Types list again and make sure it's gone. Then try registering the file with New again.