Invalid License Key for 1Password 4...won't register :(((

Hi, I purchased 1Password Mac + Windows Bundle (Family License) back in 2014. So far, I've installed it on 3 PCs and I had no problem using it. But today when I installed it on my 4th computer, it kept telling me the license key I entered is invalid. I believe this family license key is good for 5 PC installations though. The version I installed is, downloaded from your website ( It says in red "DEMO mode (expired on Friday, January 20, 2012)". It won't let me register even after I entered the license key :( Any suggestions? Thanks.

1Password Version: 4 standalone
Extension Version:
OS Version: Windows 10 Pro
Sync Type: Not Provided


  • brentybrenty

    Team Member

    @nopw: It sounds like you probably have multiple version (or parts of them) installed there. Please uninstall 1Password-anything from Windows Settings > Apps, restart your PC, and then install the latest version of the app you purchased from — just keep in mind that a license for something other than 1Password for Windows version 4 will not work with 1Password for Windows version 4.

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