Should you need to manually delete the program, or modify the installation, these registry branches are installed and used by Worship LIVE:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\Worship LIVE 6\
HKEY_CLASSES_ROOT\.sng (song files)
HKEY_CLASSES_ROOT\.ppl (playlist files)
HKEY_CLASSES_ROOT\.sdb (song databases)
HKEY_CLASSES_ROOT\.usr (SongSelect files)
Any time you edit the registry, be sure to back it up first. If you do not know how, you shouldn't try this!