Of course it is possible to revise each of your personal decisions. That could be necessary if you have denied some process which turns out as a good one later. You do so by right clicking on the TeaTimer symbol in the system tray – it is the blue one with the lock. (If you cannot see the symbol, it is probably hidden. Just click on the arrows in the system tray to show all hidden symbols.) A window appears where you have to click on Settings
to modify your personal lists of registry changes and processes.