Completely uninstalling a macOS application is a 3 step process.
1) Uninstall the application via launchpad
2) Remove or rename the application's sandbox directory.
This contains the database and other files that may have been corrupted.
Distance and Area Measure : ~/Library/Containers/ta.areaMeasureMac
Radius on Map : ~/Library/Containers/ta.radiusOnMapMac
3) Reboot the Mac or kill cfprefsd from Activity monitor.
Shared preferences for an application will persist in memory after it has been deleted.
1) Uninstall the application via launchpad
1a) Open launchpad
1b) Locate the application that you want to remove
1c) Click and hold the icon until it starts to wiggle. An 'X' will appear. Click it.
1d) Confirm delete
2) Locate and delete the application's sandbox directory.
2a) Open terminal
.
If terminal is not in your dock, open launchpad
and search for it
2b)
open ~/Library/Containers
2c) Locate the application's sandbox directory.
2d) Delete the application's sandbox directory.
3) Reboot the Mac or kill cfprefsd from Activity Monitor.
3a) Open Activity Monitor
.
If Activity Monitor is not in your dock, open launchpad
and search for it
3b) While on the CPU tab, sort processes alphabetically and select all cfpresd processes.
3c) Kill them by clicking the 'X' in the top left corner (highlighted in pink). This will trigger reload of shared preferences. It's is important the you kill all the the cfpresd processes at the same time. Killing them one-by-one may not work as they restart in a few seconds.
