I edited the settings file and there must have been a typo and now the app crashes on startup.
Online the documentation says the settings lives in $env:LocalAppData\Packages\Microsoft.WindowsTerminal_8wekyb3d8bbwe\LocalState\settings.json
I can't figure out what that path means since it doesn't exist on the computer.
I re-installed the app to fix the problem then made sure to see what the actual path is.
It's located in : C:\Users\{USERNAME}\AppData\Local\Packages\Microsoft.WindowsTerminal_8wekyb3d8bbwe\LocalState