Go into the game directory, and on the launcher, right click > go to properties > add "-setup" without the quotes in the first line that has the directory and file name for where the launcher goes to. Now, double click the launcher file after clicking apply and Okay.
This brings up the setup screen. Under graphics, click the box, you'll see two entries with the same info. Select the FIRST one.
Close setup, it will probably auto launch. If this was done correctly, you'll see it on your main monitor now. Don't forget to go back to the game directory afterwards and remove "-setup" from the launcher!
Also if you use the right screen instead of the left screen as your primary, you'll want to select the SECOND entry instead of the first.
Took me like an hour to hunt this solution down last night. I hope it helps.
-Cym
EDIT: Here's the file you need and what you need to change:
Post edited April 16, 2022 by CymTyr