Good morning Henry,
I tried ctrl+alt+w but nothing changed. Having upgraded to 16.1 I now have the help file back but didn't find the fix. I have been selecting default ref pt, but why is it happening!! Seems to be random, not just on start-up.
This is a large 2mb file and every time I add a new component (furniture) i save as the next number. So I can go back and re-draw what I just added. Bit of a pain though!