I'm running 3.61 on Win10. Any chance there is an edit I could make to a config file to set the window position on open? I'm running it in a bordered window. It's a minuscule issue, since I can just drag it, but it would be nice.

I don't know the answer (hopefully someone else will), but...

Just in case you don't get a good answer; there is a shareware program that I use to manage and set window positions. Thought I'd share it with you as it probably can solve the issue; if it's important enough to look at shareware for a solution, and a better answer doesn't present:

Desksoft WindowManager

I've been using it for about 1.5 years for a different game (an MMO and I have like 5 windows needing setting for both size and position. WindowManager handles it very well). It's a very "lightweight" software; and has features to make it easy to find, position, and resize (and then remember) windows that normally do not allow it. The author also keeps it up-to-date (latest version released Aug 27, 2021).

Maybe it will help...

Have had this problem for months. Since update to 3.67 is all fine. Try the update.