Just compared files included in the 3.2 installer with mine and found two files are different.
The ones in my MB folder are newer and bigger than those included in the 3.2 installer:
lib1770.dll (143,872 / 2018-1-28)
Plugins\mb_TheaterModePlugin.dll (215,552 / 2017-12-03)
I must have got them from numerous 3.2 patches. Should I replace those with the ones included in the installer?