You can create a new one:
https://www.unifiedremote.com/tutorials/how-to-create-a-custom-keyboard-shortcuts-remote
https://www.unifiedremote.com/tutorials/how-to-install-a-custom-remote

or just alter existing remote.lua/layout.xml.

In your remote.lua:

-- @help Run Batch File actions.run_batch = function() os.open("C:\\Users\\xxx\\Documents\\test.bat")

In your layout.xml:

<?xml version="1.0" encoding="utf-8"?> <layout> <row> <button text="Run Batch file" ontap="run_batch"/> </row> </layout>