Cannot disable background saves after latest update

[sinz54]

Microsoft Office Professional automatically updated on September 15 to 15.0.4753.1002. (I'm on Windows 7 SP1.)



And now I cannot disable background saves in Word anymore.

When I uncheck the "Allow background saves" box in Options/Advanced,
then every time I save manually, the "Allow background saves" box gets checked again by itself somehow.


AFAIK, I never had that problem with previous versions of Word.

Any idea why I can't disable "Allow background saves" permanently anymore?