If you cannot find your physical packaging or email receipt, you have a few options: Check Your Online Account
Some hardware manufacturers bundle a version of honestech software with their capture devices. If you are using a SIIG-branded device, the official SIIG Knowledge Base provides this common key: Troubleshooting "Invalid Product Key" If you have a key but it is being rejected: honestech 7.0 product key
For VHS to DVD conversion, modern free tools are vastly superior to Honestech 7.0. They do not require product keys. Try: If you cannot find your physical packaging or