Indeed, the laptop has been disconnected for days. I (or, more precisely, Windows) inadvertently updated to a more recent Flash version containing the "time bomb", so now the application simply checks the system date and decides whether to block it or not.
If I could "sandbox the clock" for this specific application, that might work, but I don't think that it is possible.
If I could "sandbox the clock" for this specific application, that might work, but I don't think that it is possible.