After working fine for many weeks, I can no longer get leak buster to start. I'm not aware of anything that changed on my system to cause this. When I try to start it, it tries to validate the license, but fails and I get the blue "buy now, register, try" screen. When I click "cancel" there I get a pop up that says "we've noticed that you are having trouble registering would you like to run the troubleshooter?" Clicking yes quits HM and gives me the blue "buy now, register, try" screen again. I haven't tried entering my serial number again, because I'm not sure what it is. I can't find the email from when I first registered. Please help.