You'll need an active Megascans subscription to get full-featured access of Quixel Bridge. Full-featured access means, you'll be able to use the following features:
- Download assets
- Import assets
- Export assets
- Preview assets in the 3D previewer and view individual texture maps in the previewer
You can avail these features during the free trial as well.
Without a subscription, you will only be able to import assets into Bridge.
Quixel Mixer is in Beta and for the duration of the beta, it will be completely free to use -- even when you don’t have an active trial or subscription. This means that you will have access to all the features of Quixel Mixer for free, while it's in beta.