I absolutely do NOT want the furniture library that comes with the software, so I deleted it; it screws with my OCD. But now when I import doors, even from the default furniture, it shows a solid wall within the doorway instead of an opening. I did tick "door and window", and the depth is more than ...

Outstanding!

My previous searches led me to believe that the file was found in Users\'name'\AppData\Roaming\eTeks\Sweet Home 3D\furniture, which was empty, and therefore didn't help much.

Thank you for steering me down the right path.

How do I delete furniture that is originally installed with the program?