I have just installed KB4532695 (which took ages).
Sadly, the Search tab still doesn't appear until you start searching. Crazy. So, if I want to search for files by size I have to start a 'dummy' search (so that the tab appears), cancel that search, and then use the Size search in the Search tab.
I don't know why there is a large red 'Close search' cross in the Search tab dialogue. Hardly necessary, as the Search tab disappears at the slightest provocation e.g. navigating to a different folder. Why can't the Search tab be made sticky like the Share tab?
Adrian