I wonder if there's some glitch on the BMW download page where they're serving up the wrong software for your car even though you entered your partial VIN correctly. That would definitely explain the "Incompatible software" message.
'16 Cayman GT4 (delivery pics
Gone but not forgotten:
'11.75 M3 E92 Le Mans | Black Nov w/ Alum | 6MT (owned 5/2011 - 11/2015)