I still have the same problems as in 2 and 3 in my original post, the resizing (as described in 3) is intermittent, I'd say it does it about 50% of the time.
OK now that we have an error free install,
Your issue 2, no longer operates that way. Hasn't ever in Ultimate.
Now, a double click on a thumbnail gives you an individual editor for that image; no next or previous, just that image.
It's very quick and handy,
If you want the image to go into the queue, just click the + sign of the thumbnail.
Issue 3, ... Ctrl/E is the keyboard shortcut for the PAGE editor. It does not change the size .
In there, you can print crop, move images around on a page, add text, loads of stuff.
Please give an example of why6 yiou think the print size changed.
You are doing fine.
fred