I got my meter working. Here is what I did:

1. removed both batteries
2. removed SD card
3. hold reset button for 5 seconds
4. Use the App Manager to “force stop” the application
5. Use the App Manager to clear the cache
6. Use the App Manager to clear the data
7. reinstalled batteries
8. reran application

I’m not sure which step was necessary to get the meter working, but these steps worked for me.