1. Login into your store admin panel.
2. Click Extensions menu.
3. Click Install Extension.
4. Click Extension Upload.
5. Click Browse button to open your computer file manager.
6. Select the extension that you want to install by click the file.
7. You can also select the extension by typing the file name here.
8. After select the file name, click Open.
9. The extension file name will be added in this field.
10. Click Continue to start uploading the extension into your site.
10. You should see the Package License Agreement after upload the extension, click Agree to start installing the extension.
The extension was successfully installed. You can start setup the extension and use it.