How to make Slice Viewer settings permanent in Mantid 3.10?

In Mantid 3.10 (running on Windows Server 2008), the Slice Viewer keeps switching to
View → Lock Aspect Ratios (Guess)
ColorMap → Transparent Zeros = not ticked
every time I change the x, y axes. It did not use to do it in the previous versions.

At the moment I keep changing the settings manually back to unlocked aspect ratio with tranparent zeros. How can I make Slice Viewer remember the changes?