You can reset Understand to its initial Settings by exiting the program and then deleting the configuration file. On Windows you may have to enable “Show Hidden Files and Folders” first. The configuration file can be found in the following location: 

  • Windows – C:\Users\USERID\AppData\Roaming\SciTools\Understand.ini
  • Linux/Unix – ~/.config/SciTools/Understand.conf
  • Mac OS X – ~/Library/Preferences/com.scitools.Understand.plist

Mac’s also require that you run the command 

killall cfprefsd

after deleting the file. Otherwise it will just be restored from the cached settings.