I am not sure what is supposed to be working yet, but this is what is does on my L4Mac installation.
I can open the search and select Syntax.

There are three Greek and one Hebrew options.
I can select any of the four databases as the target.
Selecting the Hebrew data base and choosing Query resulted in an infinite spinning wheel. Had to force quit after 5 minutes. repeatable... 12075.Archive.zip
Clicking Query for the Cascadia and OpenText reveals a list of templates to use. Lexham has no choices.
None of the databases allow selecting 'new syntax search'.
Obviously none of them have and recents listed.
Selecting query is slow and has long pauses. But when the lists show for Cascadia and OpenText, I can select a template and the input box and 'go' box show up. I can enter a word, but clicking 'go' does nothing, but cause CPU to spike for a bit to 150% and higher.