so my mouse was on the second screen on my first opening, but not on any subsequent openings. is there any way i could make it forget which screen it was first opened on(so you wouldnt have to necessarily change it)?
Not that I am aware of, sorry. I hope the changes in the next build will solve your issue.
It opened on my 2nd monitor too. I toggled fullscreen on and off and it jumped to my 1st monitor. Hope this works for you too!