I have the Navionics HD app on my iPad and love it. What a great program, until today. I installed an update from Navionics with some new tools for the program. Well, I was plotting my local waters and the program asked me if I wanted additional detailed maps. Cool, right!? I clicked OK and it downloaded. I lost about 75% of my depth contour details. I've tried to fix this with no luck. I went to the App store to see if I could find out anything there and the apps are no longer on there!!! Anyone know what's going on? This is VERY disappointing. Hopefully it's a temporary glitch. For any of you that have and enjoy this program, DO NOT download new maps! At least not until this is resolved.