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Please see the official X‑Plane Support page for help.
"Same issue, all default and addon aircraft affected. I had no issues with the first release downloaded, this only started happening after update."
I am going to uninstall and reinstall and see if I can say "No" to the update. I'll post my results. It's going to take another 1.5 hours to reinstall :-(
I'm surprised you were able to skip the update. Are you using the latest installer (4.01r1)?
In general, you never need to re-install X-Plane if you have not installed any add ons.
We have seen reports of mouse issues with three monitors that we are still investigating for a later beta update.
This site is no longer being actively maintained.