I'm guessing you downloaded the latest version of Revu eXtreme, which is 2018. But you are comparing it to a 2017 or earlier version of Revu Standard or CAD. With the 2018 version of all the products (Standard, CAD, and eXtreme) Bluebeam changed the interface to the more plain, B&W interface. So if you upgrade any product to version 2018, you are going to get this new "look". I don't think there is an option to change it to a "classic" look. Personally, I think it's pretty ugly - and it's been one of the main reasons I haven't upgraded even though we are on a maintenance plan with upgrades included. Nothing new in terms of features for me to justify having to get used to the new interface yet.
