This is the config i use:
NTSC 29.97;30 60 C:\Program Files\12noon Display Changer\dc64.exe -quiet -refresh=60
CINEMA 23.976;24 24 C:\Program Files\12noon Display Changer\dc64.exe -quiet -refresh=24
TV 50 50 C:\Program Files\12noon Display Changer\dc64.exe -quiet -refresh=50
PAL 25 50 C:\Program Files\12noon Display Changer\dc64.exe -quiet -refresh=50
Works lovely on W7 64bit.
NTSC 29.97;30 60 C:\Program Files\12noon Display Changer\dc64.exe -quiet -refresh=60
CINEMA 23.976;24 24 C:\Program Files\12noon Display Changer\dc64.exe -quiet -refresh=24
TV 50 50 C:\Program Files\12noon Display Changer\dc64.exe -quiet -refresh=50
PAL 25 50 C:\Program Files\12noon Display Changer\dc64.exe -quiet -refresh=50
Works lovely on W7 64bit.