Running Windows 10, Navigraph 8.14 prints to the printer OK as long as I stay in the current session. But if I exit Charts and try to start it again, I get a java error. I then have to either reboot or uninstall and reinstall Charts in order for it to open up again. Happens every time. I’m not printing to a pdf and my default printer is my Canon TR8520. The application has become almost unusable. I’ve never had problems with the previous version of Charts.
I had this happen to me. I did print a couple of charts during my last session (which I normally don’t do) so, based on the OP, I wonder if that is related.