Thank you for your reply. It does make sense, but maybe they should allow us to opt to save those settings so they can be restored. For people with vision issues, redoing all those settings and getting them just right is not easy. It would help if they would give us more manual ability to set up our background colors, text colors, etc., rather than giving us generalized contrast themes that don't work for everyone who does have vision issues. Pastel colors for fonts are hard to see, as are thin letters. The background lighting has to also be adjusted. If they gave us more manual ability to do that, it would at least be easier to reset what works. It's frustrating when you finally get it right and they just delete it. It takes a lot of tweaking to get it right when you have vision issues. Tying their random desktop pictures to a theme in terms of also changing the background when it wasn't that way before is also weird in my opinion. I'll just stick with the boring blue ribbon because of it as the background tied to it now doesn't work for me, unfortunately.
Thank you again for answering my question. Very much appreciated.