Recently I realized, on the Deep Sky Stacker forum, that the latest Canon DSLRs have CR3 RAW files that will not be supported by CaLIGHTs. I prepared an update for CaLIGHTs so that it will support the latest DSLRs including the latest Canon Cameras. Please use this link to go to the GitHub site
Once you are there you should select the v3.1.9CR3Update. There are instructions explaining how to perform the update and the files that you will need to update. This update is intended for 64b computers.
Clear Skies
Peter