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...please refer to image above.

These are a collection of screenshots from my Studio "Runtime" folder content tree in S3A.  All of the blue highlighted selections are non-content folders (e.g. contain nothing that can be loaded into a scene) which are clearly the result of Daz installers as can be seen from the folder names.  When I install content from Zip files, I do so manually by first extracting to a temp. folder and then moving the individual component folders (Geometries, Characters, Poses, etc.) into their proper locations.  Templates, Readmes & the like go into separate folders outside of the Studio application.

Content "Data" folders, while important for the application, should not be visible anywhere in the Content tab.

This is just downright sloppy programming and I'm not even a programmer.

 

It looks to me like you have some errors in your content directory settings.  You are absolutely right that these folders shouldn't appear in the Content tab, and they don't in mine.  The Data subfolder, for example, will not appear in the Content tab unless you have a different folder listed as the content folder than the folder containing the Data subfolder.