The new features available in the 28 March 2017 release are:
Team Drive integration : Google's new shared spaces for teams, now even more powerful with Powertools Document Management functionalities!
Audit : administrators can now monitor any activity within Powertools thanks to the dedicated Audit logs!
- API : Powertools new API is now available; Find the full technical documentation here : https://powertools4drive.designedforwork.com/api-docs/site/index.html
Please make sure your extension is updated to version 3.3.4 to have full compatibility with those new features.