I seem to be back on track. The window sizing settings were throwing me off, the default setting was not working at all. Maybe something changed in the use of Windows DPI aware?
Anyway, the good thing is that I found some fixable display bugs in my dialog box controls (TPaintBoxes) that were not resizing correctly. I had not seen the bugs, as I had not been using Windows' DPI aware. They were glaringly obvious with the new settings.
Ubuntu is running again, but I lost some files, I assume my own fault. No big deal, just a Lazarus reinstall.
Thanks.