I have PL v5.0.0.48b (auto update on)
On my Win 7 64, PL keeps asking at startup for my activation code. On my XP machine it does not keep asking for the activation code.
On my Win 7 64 machine, PL will also sometimes not show in my Trasy as to programs running, and will show in the Start Menu as PL (recover lost tray icon)
Thanks for looking into this.