To install Altium Designer extensions in an offline environment, you must download the from the Altium Downloads page while on an internet-connected machine. This package is a zipped collection that includes both the core software and its extensions. 🛠️ Step-by-Step Offline Extension Installation 1. Acquire the Offline Package
A progress bar will appear. Once finished, Altium will prompt you to restart the application to finalize the integration. Troubleshooting Common Issues altium extension offline install