PowerPoint for Mac vertical scroll bar not working in Sierra
I downloaded Sierra, opened a PowerPoint for Mac 2011 version 14.5.4 and immediately noticed that the vertical scroll with my mouse does not work. It will only go "up" (eg, slide 14, 13, 12, 11, 10) or will get stuck between 2 slides.
I've unplugged and replugged my mouse, turned PPT off and on twice, and restarted my MacBook. No change.
I know it's early days and these are growing pains with the new OS, but I use PPTX constantly.
Any tips are much appreciated.
MacBook Pro (Retina, 15-inch, Mid 2014), macOS Sierra (10.12)