Harold Long Posted January 2 Report Share Posted January 2 I have tried previously to upgrade Nitro Pro. For some reason the your system does not recognize my serial number. I've been using version 13 since 080720. It's fantastic software and I've been using it without any issues. I want to upgrade if something is available, but I can't seem to upgrade nor contact anyone at Nitro Pro. Can someone help me, please! I'm really frustrated. Link to comment Share on other sites More sharing options...
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