on adding folder items to this_folder after receiving added_items
	do shell script "mv ~/Downloads/' Downloads ' ~/DLIcon"
	do shell script "mv ~/DLIcon ~/Downloads/' Downloads '"
end adding folder items to
 

saved from Script Editor to /Library/Scripts/Folder Actions Scripts/RefreshDownloadsDrawer.scpt and enabling it on the Downloads folder.

DROP TRIGGER drawer_defender;
DROP TRIGGER drawer_cleanup;
DROP TABLE drawers;

…though if you wouldn’t have figured that out yourself, I very strongly recommend against setting up those tables/triggers in the first place. Caveat hacktor.