Hello,
thank you for reporting the issue. We know that this happens to some users, but we don't know why nor we can replicate it on any of our machines. From Launcher point of view it looks like that the dialog was cancelled by the user so it is hard to write a workaround for this.

Temporary workaround is to set the compatibility option 'Disable visual themes' on arma3launcher.exe. This will force Launcher to use an old dialog because there is some other issue with the system dialogs when that option is enabled. But the point is that the old dialog will work.

Sorry for the inconvenience.

Wow lol I didn't even think about checking compatibility settings. Thank you so much. The only thing I can think of is that on this format I went back to a very basic windows theme. Basically, I have the old style theme that you would have seen on XP. Maybe disabling alot of those visual themes in Windows control panel and then restoring my game from a steam backup is what caused it?

I guess that is omething to keep in mind if you have a way to pass that on and compare to other cases?

I work in technical support, but have strayed away from Windows and remembering all these tricks like the compatibility mode and am rather embarrassed I did not think of that myself.

Thanks for your Wizard, you are true to your name.