For ease of use, by default, Connecter is showing you only the most common 3d industry’s file formats.
You can find and manage a list of all default file formats organized by type (3d files, Materials, Images and Others) in Settings > File types.
You can also add any other file format you’d like Connecter to display by adding its extension and pressing the + button in Settings > File types > Others.
You can quick filter what file types (e.g. 3d files, Materials, Images) are displayed in Connecter by using the Files drop-down. Check or uncheck the options you need and press “Apply”.