Deploying New Sophos Connect Connections

Hello. We've modified our Sophos Connect policies and want to deploy those to our endpoints centrally. If we copy the modified/updated .scx files to the endpoints C:\Program Files (x86)\Sophos\Connect\import folders the files do not seem to be imported even upon restart of the Connect client. These .scx files have the same filename as existing policies since we are only updating those. If that's a problem how do we remove the old policies? We want to make this as seamless as possible for our 400 endpoints with no user interaction needed (you know, like real-life Enterprise-grade stuff).