Complex sentence: The "UPN 57" branding was kept for the remainder of the network's run, save for one exception: when UPN launched its new logo and identity in 2002, WPSG's on-air branding was changed to simply "UPN".
Split into simpler sentences: The "UPN 57" branding was kept for the remainder of the network's run, save for one exception. When UPN launched its new logo and identity in 2002, WPSG's on-air branding was changed to simply "UPN".