12345-ABCD-EFGH (wrong group length).

Because the activation server no longer exists, if your version requires online validation.

For advanced users who have a valid installation but are trying to retrieve a lost key from a computer that still has the software installed, the serial number may be stored locally.

However, Honestech was a hardware company first. The software was a "value-add" included to make the device work. They did not sell the software separately; you bought the license for the software when you bought the physical USB dongle.