That's a great tip about loading the model on a web page, and not closing the browser to keep the data loaded for offline use. I'm about to show a client some models on Sketchfab, and I don't know if there is Wi-Fi where I will be. So I will try this option. Though it would be amazing to have a desktop app that opens local models for viewing. The Sketchfab viewer and rendering engine is nice to use. Hopefully they are still considering a desktop PC app for viewing models in the future.