Hey @zocket,
Stop the container, move the current database file just so you still have it for now. Upload the modified one and make sure the permissions match if all is good start up the container.
If everything is working and looks good you can then delete the old database file. I would also then look at the templates and find the backup to GitHub workflow (maybe 4 or 5 down on the list) and use that to backup your workflows to a private github repo so you have a copy if needed in the future 