where can i download unreal studio beta?
The Unreal Studio Beta ended in December 2019, and the Unreal Studio plan was also ended.
Instead of a separate plan for access to the features, we decided to make them a core feature set of the Unreal Engine. If you install Unreal Engine 4.24 or later, you automatically gain access to the features, including Datasmith.
More information here: Frequently Asked Questions - Unreal Engine