Hi Damien,
Here are a few screenshots to display the issues I'm having. I've installed Bridge and Essentials opened like this (Initial Essentials screenshot). In order to get it to look like it should I have to hit reset. I tried closing and reopening and hitting ctrl, alt, and shift to reset and it still opens like this first screen shot. Every time I open it or even minimize it I have to hit reset for it to look like the Essential Reset screenshot. My last screenshot is of my personal setup of Preview which I created. Again, it acts like my Essentials in that every time I open Bridge and select it I still have to hit reset. I am using Bridge version 10.1.1.166