I checked the connections and have rebooted several times, and checked the order of the displays.
When I start PD, it opens on the left monitor even though the middle one is selcted as main display.
But the main problem is once it starts, it is unusable. see link
https://photos.app.goo.gl/8LizQqYwvMojCAjQ9
thanks in advance for any help and if no one knows how to fix this can someone tell me how to revert to the previous pd edition?