In the event that this happens:
1. Fully quit the Usage Meter from it's own menu by clicking on the donut in the menubar and clicking "Quit".
2. Look for the following directory
Windows: C:\Users\[your User name]\AppData\Roaming\
Mac: /Users/[your User name]/Library/Application Support/
3. Carefully delete just the "HughesNet Usage Meter" folder under that and empty the trash.
4. Restart the Usage Meter. This will regenerate all the underlying information as if it were run for the first time, thus correcting the error.