I have about 10 license keys for nevron charts and all was working fine. But from some time our compiled binaries show "non license" banner on the nevron charts. I downloaded your latest Charts and run license manager from it. And it shows "Invalid license key" for every key I have. BTW our application was using net 3.5, now we moved to 4.0, may be it is the issue?
Please help.

Hi Alexandr,

Most likely the license keys are from an older version of Nevron Chart - please send the license key(s) along with the version you currently use for review to sales@nevron.com.

Best Regards,
Nevron Support Team