I have same warning, all demo Expert Advisors can't be tested after 30.nov.2015. I think this warning appeared after updating MT4 to version 920.
Oh, thank you for confirmation, now I know reason for sure.
This is quite bad, as sometimes I am using different devices to speed up full optimization and test different settings in parallel. Demo versions of EAs work great this way, until now. There is no way that I will activate EA on all laptops an VPSes just for optimization. Horrible update.