TheoL Posted July 26, 2020 Report Share Posted July 26, 2020 I have Nitro pro installed on may laptop, and desktop as per EULA. On desktop, I only occasionally use. Since I last used Nitro Pro on this machine, windows 10 upgraded to 2004 release. When I started Nitro Pro to use, it informed me was not activated (but it had been). When go to the activation portal, reported that only 1 of 2 activations active. But I reset anyway, and tried activating again. Always, I get the error "-23: Error - License number already used" - and I cannot activate Nitro Pro. I am using version 220.127.116.117 I tried deactivating on my laptop, (with intention to re-activate on both laptop / desktop), but in deactivation dialog reported that the serial number was not valid. Thanks Link to comment Share on other sites More sharing options...
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