Cornelius Rusch Posted April 7, 2022 Report Share Posted April 7, 2022 (edited) Hi, i am using NItro PDF Pro since 2006 on an "older" PC and would like to upgrade now. Unfortunately the Upgrade Check does not accept my old style serial number (Nitro V5) . Is there any chance to purchase an upgrade for an older version at all ? What would be the procedure to get it ? Thx in advance for any hints to this topic Edited April 7, 2022 by Cornelius Rusch Link to comment Share on other sites More sharing options...
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