1. Goto your Restyaboard installation root directory. e.g., directory: /usr/share/nginx/html/restyaboard/
2. Extract/unzip the purchased plugin zip into the Restyaboard installation path. e.g., /usr/share/nginx/html/restyaboard/
3. Give file permission to extracted files. e.g., chmod -R 0777 client/apps/r_zapier/
4. Goto client/apps/r_zapier/ directory, to configure the plugin using app.json. Or You can also configure it on http://{YOUR_SERVER_NAME}/#/apps/r_zapier path in your Restyaboard server and the configuration values are given in http://{YOUR_SERVER_NAME}/#/oauth_clients.
5. After above process, clear the browser cache and login again to view the installed plugins on your Restyaboard.
6. Launch zapier app from Apps drawer and then configure your Restyaboard account.