Dakota stephens Posted April 5, 2021 Report Share Posted April 5, 2021 I am not able to activate Nitro Pro v10 it is saying -20: Error - Invalid license number. Do I need to deactivate a license on an old device? If yes, how do I deactivate a device that I can no longer get to? because I am trying to deactivate an older FrontDesk computer that we retired. Sincerely, Dakota Link to comment Share on other sites More sharing options...
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