Options: 

Spacing between parts - You can set the spacing between the imported files by changing the value.

Number per row - You can also adjust the number of files per row by adjusting the option.

Reset Origins - This option will move the entities in each sketch (layer of the dxf file) such that the bottom left corner of their bounding box is at the parts origin.

Combine to a single sketch - If checked all layers in the DXF will be combined into a single sketch. If unchecked a sketch will be created for each layer in the dxf file.

Extrude Profiles - This option with extruding the outer profile of each sketch. 

Thickness - The to the value to extrude profiles (If checked).

Apply Material - You can choose to automatically assign a material to all of the newly created components.

Material Name - The material to apply. Note the material must exist in the current model. You can browse the material library and add your chosen material before running the import command.

Import Text - If selected text from the DXF file will be read and rebuilt as Fusion 360 Text. The units of the DXF file will be used for scaling if they are present. If not the current document units will be used to interpret size.

Font - The Font to use for the imported text. To edit the available fonts you can edit the `fonts.txt` file located in: `./commands/resources`

Close Sketches - This option will attempt to close small gaps in the imported file.  

Gap Tolerance - 2 points within this tolerance will be merged. NOTE: This will, of course, have very subtle effects on the exact placement of imported geometry.

Save Settings - The current settings in the dialog will be saved as defaults for the next time you use the command.

Show Popup - If this is unchecked AND you save your settings, the popup informing you to select DXF files will not be displayed on future runs.

Install: The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. Or, simply double-click the downloaded installer to install the app/plugin.

Uninstall:

You can unload the add-in without uninstalling it by clicking the "Stop" button when the add-in is selected in the list box on the "Add-Ins" tab of the "Scripts and Add-Ins" dialog.

Unchecking "Run on Startup" causes the add-in not to be loaded in future sessions of Fusion 360.

- Navigate to ./ApplicationsPlugins folder and select the app bundle you want to uninstall

- Either drag the app bundle to the Trash or right-click and select “Move to Trash”

- Right-click on the Trash-Can and select “Empty Trash”

- If you prefer keystrokes, you can also just select the app bundle and then hit Command+Delete to move the app to Trash, then empty the Trash and the app will be removed.