Multi Instance Questions

I am setting up a second instance of octoprint on my windows server. Already have it setup with separate start up batch files on separate ports and basedir's. But currently the second instance is just a copy of the first.

Two Questions

What files do I need to delete/alter to make the new instance forget about the current printer/cam? Just delete config.yaml? or are there other files I need to delete in the new instance folders?

Both instances appear to write the logs to the same file in the actually octoprint\logs folder. Is there a way to separate the logs by instance?