Can I know where D|S keeps the profile maps of a BVH?
They do not exist as such. If we have a mapping called "TheHell", there is no TheHell.xml or similar. However, they are stored somewhere...
I have created a map for a Blender bvh, and no file has been modified with the date and time that has to do with Daz...
You could always install Git and make your library a repository, then run a diff before and after your Daz session to discover what file(s) changed, eh?