If the time-lock triggers a generic black-screen system fault inside your simulation profile, switching liveries can sometimes force the simulator's internal memory to flush the expired gauge cache.
The "Beta 9 Has Expired" error is not caused by your simulator, but a self-imposed expiration inside the QualityWings 787's own code. It was a timebomb inadvertently left in the released version's gauge files, set to deactivate the add-on after October 15, 2017. beta 9 has expired qualitywings 787
When QualityWings officially released the 787, they set an expiry date for older beta versions. If your system clock passes that date and you are still running an outdated plane configuration file or an old installer version, the aircraft’s internal license check fails, triggering the "Beta 9 has expired" lockdown. If the time-lock triggers a generic black-screen system