I don't have much experience with Starwood awards. I transferred a bunch of miles to SPG last year from Amex, and then the trip was cancelled. So I'm trying to use these SPG points now. I booked a free night award for the Sheraton Times square NYC. I'd like to upgrade to a club room, and not sure if I can use points to upgrade a free night reservation, or if point upgrades only apply to paid nights?