Content Browser 1: default browser preference?

I’ve recently noticed a change in behavior and I’m not sure how I got there, here’s where I’m at:

The behavior I’m experiencing when I trigger the ‘find in content browser’ functionality (from anywhere in the editor) is that Content Browser 2 pops opened in a new window verses the asset being found in Content Browser 1 (which is currently opened). This is a new behavior that just started happening in the past 2 weeks and is a total pain in the *** for lots of reasons. I’m pretty sure that I probably messed up a default setting somewhere but I don’t see an option or preference setting to set a default behavior for Content Browsers.

Is there a place in the options or preferences to set the ‘find in content browser’ functionality to always default to using Content Browser 1?