FOUND IT!
Having just been upgraded to the new version on Mac OS I've been completed pissed off by the terrible 'improvements' that have been rolled out!
- the search function takes much longer to find results
- the search bar should have remained at the top
- the windows that can usually be dragged left/right to show/hide the lists of notes and shortcuts is now stuck closed, and I can't get it back open again
What a joke! I'm properly frustrated by these truly down-grading 'improvements'.
Thankfully I found this link on this page where you can instal the good old legacy version. I have it happily working on my Macbook Pro already. Many thanks to the person who posted it. https://help.evernote.com/hc/en-us/articles/360052560314-Install-an-older-version-of-Evernote