I haven’t tried to run n8n locally as a desktop version, Just curious has the local file trigger worked for you if you were to update a file in your C:User\Downloads file path?
I know most people usually run n8n on docker, and recently I found out from another thread there is a way to share a directory between the Host computer and the docker container. So theoretically you can share the powershell script by placing it in a file directory and the n8n running on docker should be able to load it into its own file directory.