This dialog box is reserved for specifying search locations for parts and assembly documents associated with the project.

Indeed, if components are saved in folders other than the selected assembly folder, you need to specify the directories in which they are saved.  ProjectManager   check the presence of parts and assemblies.

This button    add a directory.

To delete a search location, select the folder and press  .

Several folders can be added, pointing either to network locations or to local locations. These added locations are all enabled by default  . If a file is not to be taken into account, simply uncheck it.  .

If parts and assemblies are to be searched in subfolders, add the top folder and tick  otherwise    only the files listed will be browsed.

When a project is  selected   all locations are then scanned.