Logic was updated today. Here is Custom Grey Light modification for 10.2.1. Follow the usual installation procedure beginning from back-up (see “Install” at the top right corner).
Looks exactly the same as before, except that Apple has made some changes to the default GUI (blue button for automation, etc.).
NOTE: If after unzipping the file shows up as “MAResourcesMapping.plist.txt”, you should delete the “.txt” part!