I guess they have fixed it for the next version
https://www.ventismedia.com/mantis/view.php?id=21273

Have uploaded the debug file, and replicated the behavior a few times.

That was the first thing I tried (closing MM in maximised vs non maximised state). I'm away from my studio right now but will test again over the weekend and report back but fairly sure it's definitely not working like it used to.

I'm unable to reproduce with identical dual monitor. MediaMonkey opens on the monitor it was closed on. Maxmized or not. Please capture this in a debug log (step 4b) and attach the log to a Support Ticket.

Edit: correction.

My first test was not in maximized view.
When maximized it does start on the other monitor but on primairy. But it looks like it is moved back.
I use and extra button next to min/max/close window to move a window to a otherscreen. Now when using it, MM moves it directly back to main screen.
Als a smaller mm window on my second screen, when maximizing will move it maximized to main screen.

Two monitors here. Have tested a few startups and switched MM from window and closed it. For me it always opens back on the screen where i closed it.

@tbm72 what dpi settings you use?

I see you're asking for multi monitor user bugs for the latest version (2024.0.0.3063). I can tell you straight away as a 3 monitor user that this version suddenly doesn't remember the monitor it was previously opened on. I've used MM for years and only on this version it always opens on my center monitor (out of 3).

I always use it on the left-most monitor and it's always remembered that on subsequent launches but on this version it always defaults to the center monitor on relaunch. Please revert to whatever it was before this version!