Are you having trouble locating your or getting the Service Center to connect to the servers?
QualityWings originally released the 787 with certain "time bombs" or expiration dates built into specific beta or early-access builds. This is a standard practice in software development to ensure users aren't running outdated, buggy versions when newer, more stable builds are available.
Ensure you are running at least Version 1.4.0 (or the most recent version listed on their official site).
Dealing with the "Beta 9 Has Expired" Error in the QualityWings 787