I am about ready to tear my hair out with the new update. There was always a search window in the upper left corner, just like in Windows Explorer. When I needed to find the occurrence of a word in a file, or a phrase, such as the word "Union" for example, or the phrase "American Eagle gripping a flag," all I did was go to the drive or the folder where I though it was, have that displayed in DO, hit the return key, and it would pull up every folder, image, or document where it occurred. It's an incredibly useful thing for me and I use it maybe 25-50 times/day. The results are instantaneous -- or they were. Now I have two search bars in the upper corner and neither works. And I have some crazy search window at the bottom that doesn't work either. When I can get it to do something, it searches forever and either finds nothing, or searches forever and never stops.
This is so critical to what I do and the newly appeared bars are so stupid that I can't imagine how anyone uses them or is coping with the change. I can't imagine what they are for or how they work. But far more importantly, where is the old bar?
I'm not sure what bar along the bottom you're talking about. You have the Find panel open, which is different from the search field (the search field top-right uses Windows indexed search, the find panel uses Opus's own non-indexed search).
You can close the Find panel by clicking its X to close it, if that's what you're trying to achieve.
That also looks like Opus 12 so I'm not sure which "update" you're actually referring to. Opus 12 hasn't changed in over a year.
As well as the second search field you also seem to have added a Find Files button to one of your toolbars; this is probably what you're clicking that's opening the find panel. Maybe try resetting your toolbars to the defaults (right-click an empty spot on the toolbar, and choose Toolbars > Factory Reset).