I've had & used Antares Autotune Pro for quite some time, just to slightly tune vocals (because I've gotten too lazy to spend the time getting a perfectly pitched vocal performance).

I'm working on a track, and the oddest thing has started happening. The song is the key of B, but when I apply the settings & hit 'play', AutoTune reverts back to the default key of C. Multiple sessions, same problem.
Anyone else had this issue, and if so do you know a work-around/fix?
TIA