When you install new products in DS4 they will show up in either Poser Formats or Daz Studio Formats or both. They will not automatically be assigned to a Category, we have to do this ourselves manually. Like we did in DS3.
If you have DS3 and you sorted them into categories then you can use the “Migrate Old Content Database” command (it is in the same menu as “scan know directories for files”).
To give you a better understanding the Poser and Daz Studio Formats there just are a mirror of the content folders on your Hard Drive. These are connected you the “scan know directories for files” command.