Now you can go to your website URL and check the initial website page and the Administrator Panel at http://www.your-domain.com/admin, make sure to remove /install folder if everything is alright. You should retain a backup copy for future upgrades and re-installs.
After the above is checked and done go to Administrator Panel – Configuration to configure the script features. You may also need to setup categories, locations, paid packages and other options to start using your new script.
If you will ever need to recreate your database or reconfigure the initial parameters use ./install folder by re-uploading it to the site. There you can select whether you want to reinstall everything or just database or configuration file. You will also need ./install folder files to upgrade the script.