Same issue on a windows 10 computer via the XBox App. I set windows Scale and Layout to 100% as suggested by HackMan66 above. I can see entire message including the “Don’t show again” and the OK button. However, when I click on the, nothing happens. A mouse click has no effect on the screen, which is locked. I rebooted Tried multiple times to log out of dev mode but cannot. Every tome the Sim opens, the same message (below) pops up and locks the screen.
Here is full message:
DEVMODE USERS Important Information
!!! IMPORTANT KNOWN ISSUE!!!
“Please do not use this version of Microsoft Flight Simulator to build Mission
packages that you would like to get published in the Marketplace.
We will communicate further information regarding this in the coming days.”
Any suggestions on how to close the dev mode and get back to the Sim would be much appreciated