My website's backend admin area has changed after a K2 update.
Did the css/view of the k2 backend change?

Please take a look at both screen shots below. One is before the update and other after the update

K2 new item admin section BEFORE UPDATE
prntscr.com/s2zn7g

K2 new item admin page AFTER UPDATE
prntscr.com/s2zpwp

The company that has updated my K2 version say's the K2 admin view changed with the update, and the view is now the k2 normal.
Is this the case? Did the views in the k2 admin change in the last several months between upgrades? Did I lose some custom css with the upgrade??

Thank you for the clarification.

The functions remain the same after the update, however, I was referring to the overall look (design/css of the page)
Is the design of the page (before update) normal or is this custom css?

Thanks for your help.