Paper size problem

I have just been forced to reload Draftsight (Mac version).  I hate being made to do that because it always takes me a long time to get things back the way I like them.

Print Configuration settings is one of the things that gets mucked up.  All my standard page settings get lost and have to be reinstalled.  I have just tried to create an A3 sheet for a legacy drawing that was that size.  But Draftsight has made the page more like A1.  I have re-checked the setting and it correctly shows A3 size but on screen the length is about double what it should be.

Have I inadvertently done something wrong or is the newly downloaded Draftsight version to blame?