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Read first: Previous version support information

Re-installed 1pw v4 and activation fails

This is the error message located in the log file:
_ The protocol version the client has attempted to negotiate is
recognized, but not supported. (For example, old protocol
versions might be avoided for security reasons). This message is
always fatal._

Please don't tell me that I can not activate my legal license again?

(Yes, I know v4 is old, but renting software, especially something that stores my important data, is not something I'm interested in)

1Password Version:
Extension Version: Not Provided
OS Version: Win 10


  • Jack.P_1PJack.P_1P

    Team Member

    Hi @adrm:

    Thanks for writing in! If you download the latest available version of 1Password 4 for Windows (, available here, does that improve your state of play? Let me know!


  • adrmadrm
    Community Member

    Hi Jack.
    As far as I can tell, v4.6.2.626 works perfectly. In fact, it seemed to find the key I had entered when trying to activate the older version and started without prompting me for the key (Although the Registered To filed is blank).

    Thank you so much for the prompt response.

  • Jack.P_1PJack.P_1P

    Team Member

    Hey @adrm:

    Glad to hear you got it working! Stay safe out there. 😀


This discussion has been closed.