Resolve Studio 12.5.5 - No UI Interaction?

After the upgrade to RS 12.5.5, I cannot resize the main workspace window and cannot move the workspace window (i.e. by dragging the top bar). It is locked in the upper left hand corner of my monitor and too small to be of use. Any ideas as to what's going on and how to fix it? It is a known issue/bug?

I'm on MacOS Sierra, 64GB of RAM, Intel 12-Core Xeon processor (2.7 GHz), and AMD FirePro D700 graphics card.

Much appreciated!