SQLite Forum

where does the amalgamation preprocessed file go when unzipped
Into a subdirectory named sqlite-amalgamation-3360000 .

A subdirectory of what? (you might ask) The current directory of the process doing the unzipping. If you've got double-click, auto-run-associated-app turned on for .zip files, you will have to figure out what directory it runs in. First guess would be the directory in which the .zip was found.