Pingplotter exits after 17 pings-License Error45.2

I'm running win8.1 64 with version 3.41.0s Standard. Always closes on 17th ping no matter what IP I ping, even local host. Error in PP_Errors.log is <License Error 45.2>. I have not given my license to anyone and I do not use on more than one computer. Permissions maybe?

Hello!

Sorry you're having this problem.

We've found this issue with just a few old, old license keys. If you could email us with your license key (support@pingplotter.com) - we can get this fixed for you.

-Gary

It works! Thank you!