The procedure is to go to the Document manager:
1. Select the drawings you need to explode
2. Select the button that says add to explode
3. Click ok
4. Your drawings are saved in a folder called “Details Exploded” not the folder called “Details”
If you are trying to open the drawings inside the “Details” folder with straight Autocad it will not work, if you have exploded your files look for the folder that is labeled “Details Exploded”.