The investigation of damaged registry problem revealed that this was a fault of low quality spyware/adware remover programs like Spyhunter. It deletes some registry keys that belong to Internet Download Manager without any knowledge. That's why users reported about lost downloads and lost settings.
We tried to contact "Enigma Software Group Inc." (the creators of Spyhunter) using contact form, but got no reply. The company doesn't have a phone, email, or real street address, it has only a web site. The domain name has been registered with a free email address, and the phone doesn't answer. When we were testing Spyhunter, it crashed several times with run-time errors, so we doubt about the quality of this software. We are going to start a lawsuit against the creators of Spyhunter unless they reply with a fix quickly. Internet Download Manager has no spyware or adware modules inside, and we can easily prove it in a court.
Several registered users of Spyhunter tried to contact "Enigma software group", but got no reply. If you have Spyhunter software installed, we advise you to try to contact "Enigma Software Group" yourself to resolve this problem, or uninstall/refund Spyhunter to avoid future problems with your computer. Please write to us if you have any questions.