Visit the PowerArchiver support page for assistance if you cannot access your account. Important Registration Details

Major versions have their own registration codes. A 2019 code will not register 2021 (v21).

Registration details are stored in the registry (HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\PowerArchiverInt\General) in a binary format since PowerArchiver 2011.

Disclaimer: This guide is for licensed versions of PowerArchiver. The software offers a 30-day evaluation period. To make sure you get the right info, can you tell me: Did you the license, or was it from a giveaway ? Are you getting a "code not working" error message? If you provide these, I can offer more tailored steps. Advanced Installation instructions - PowerArchiver Help

If you have lost your code, you can recover it through the following methods: