I uninstalled the previous version of Spine and reset my computer. I launched Spine with my display set to 'extend' and it still didn't open. I switched to single display and opened the launcher, set the version to 4.0.43-beta and before I clicked 'Start' I switched back to 'extend'. Spine opened with multiple displays. I had tried that with the previous version and the launcher wouldn't open unless it was set to single display.
After Spine opened I closed it and opened the launcher again. It opened with multiple displays.
It seems to still have an issue when opening the first time, but after you get it open and switch to multiple displays it works.
I have also noticed that Spine leaves the 'Start menu' shortcuts when uninstalling, maybe I had an issue with this version because of a setting that was left behind by a previous version? Just speculation.
Thank you guys, I really appreciate it! After I recover from Christmas I plan on purchasing the Pro version. This software is great! Using the runtimes to import the animations looks so much better than using spritesheets, plus the amount of space saved, and decrease in load times is fantastic!
Thank you!
And obviously the support!
Edit: After switching the Spine version back to 3.8.99 and restarting Spine, it will still open with multiple displays. I believe this was not the case before the new update, but I only tried it once and did not wait more than a couple seconds for Spine to open.