I've used MX Mariner and NOAA charts
on the East Coast
for several years without problems. I'm now at home in Seattle
trying to plan for a trip on the Chesapeake this summer. When I try to switch to a chart region in the east from my local area chart MX immediately quits. I don't remember having problems switching chart regions in the past. I have re-installed MX and updated the relevant NOAA chart regions on my Nexus tablet. The OS on the tablet is Android 6.01. Maybe I'm having a senior moment but am thoroughly stumped. Any guidance would be appreciated. I cannot find any way to contact MX Mariner for an answer.
More: The only way I can change chart areas is to uninstall an area and then re-install. Then it becomes the active area. I cannot switch to the other areas I have installed. If I try to use the drop down menu to chose a different region MX quits. I submitted an error report but no response.