How to change CATIA environment

My catia v5 environment seems to have changed to some dark blue dimension(please see images) with slightly different looking icons, and I was wondering if anyone could tell me how I could get it back to what is usually is(usually as seen in the 3rd screenshot).
Thanks

3 Answers

here is the solution.

Answered with a tutorial: https://grabcad.com/tutorials/how-to-change-catia-environment

change platform.

Tools-Option-General-Display-p1,p2,p3