After installation there should be an FAQ page automatically created with the default FAQ add-on shortcode in it. All you need to do is add it to your menu in order to display it to your users on the front-end of your WordPress site.
If you get a “directory already exists” error message, you will need to use FTP to upload the updated plugin to the folder that already exists. Check with your hosting provider for instructions on how to use FTP to upload files. Please make sure you “unzip” the plugin files before uploading them via FTP