Minimalist UI mode or redesign
The icons that run across the top of the screen (above the tab list) from my experience take longer to comprehend than abbreviations of their nature; that is, once you've first seen their title.
e.g. (*see image) NW stands for New World, PS stands for Project Settings, etc., etc.
I've given each feature in this list a distinctive button/space to help differentiate it. Doing this helps one identify what there looking for faster.
The device tabs have been better defined (again for identification/speed), and given a drop down menu with a scroll bar. This removes their presence when one isn't looking for them, thereby decluttering the screen; and I find vertical selection to be faster.
The devices listed in the sidebar have been colour coded for faster/clearer comprehension, and better defined. I'd suggest making their settings menu a 1-click action.
The sidebar elements (3D preview, device list, history) have been given pop-out buttons/options so they can be better arranged.