Hi dmichael, the launcher supports a “-noselfupdate” flag that can be used to disable self-updates. On Windows, just add -noselfupdate to the shortcut. On a Mac, you’ll need to try something like the instructions here: macos - How do I pass command line arguments to Dock items? - Super User
Right now, our application definitely works best for individual machines that can be updated. We have some work to do in order to better support lab computers installations and make it easier for schools to setup labs. Let me know if you have any questions. We appreciate the feedback so if there are any specific requirements or cases you think we should better handle, let us know so we can take them into account for the future.