Install the downloaded plug-ins:
Select "Tools"> "Plugins" from the main menu, then select "Download" tab.
Click Add-Ins, and browse to the location where you downloaded the file .nbm. Select the file and click "Open."
Each plug-in you want to add Repeat the previous step.
Click Install, and then complete page of the installer to install the plug-in.
If you select the file selector plugin does not appear in the "Plugin Manager" and "Download" tab, then you may have the same or newer version of the plugin installed. You can check the "Installed" tab to verify that the plug-in is installed and active.
Activate and deactivate plug-ins
Select "Tools"> "Plugins" from the main menu, then click the "Installed" tab in the "Plug-Manager".
In the left pane, choose to activate or deactivate plug-ins.
Click the "Activate or deactivate" to activate or deactivate plug-ins
