Where would I do that?
I have looked into
https://www.kinook.com/Forum/showthread.php?t=2267 ("How to change the fonts & colors in UR"), which speaks of Windows settings, but those have not been changed, and in my browser for example, selections are white on green, as always.
Also, in that link, it says, "Different variations of window colors and styles can also be chosen by changing the Paint theme at Tools | Customize | Options in Ultra Recall." - I looked into this, but didn't find any such setting in there.
It's just that in UR, search terms in search results are now black (not white e.g.) on red, instead of black on yellow, as before, and for no apparent reason.