I had the fonts. Issue as well. However, after installing the fall creators update for windows 10. The panel shows after à every sim start and pc reboot. The fall update fixed whatever the creators update screwed up. So if you have the issue update to the fall windows 10 version 1709.im on P3D V4. 1.
Good morning. I'm new here but I thought you might be interested in this. Winair recently acquired a Twin Otter in a "heritage livery" PJ-WIP. It would be nice to have this represented in the sim. Here are some shots of it at TNCM.