MS3-- % ratio cannot be changed tonight

The default is 100% for the size of the score; for me, that's a bit small, so I simply click 150% from the drop-down and the score increases in size. Tonight, though, nothing changes from 100%, not bigger, not smaller, nothing. First time for this problem, on any version.
As to MS3, the 3.0.1 is functioning as "normally" as MS2 was, other than this latest quirk! Great work debugging!