Neither the start nor stop command are valid on windows... They should be something along the lines of:

 "command": "\"${{registry}.HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths\\chrome.exe\\}\" https://smarthouse-dev.remex.hdm-stuttgart.de?token=${{userToken}}"

and

 "command": "${{environment}.SystemRoot}\\System32\\taskkill.exe /im chrome.exe"

Please try out on your own system before doing pull requests :)