This has been tested with open cart 1.5.x . You need to backup the config file before editing it.
- Locate config.php and admin/config.php file.
- Find the old URL and replace with the new URL
- Change define DIR if neccessary to the correct location
- Leave the DB configuration if no changes in the database path.
- Save changes and visit your OpenCart store with the new url.
For all your other queries on OpenCart Hosting, please visit https://www.milesweb.com/apps/opencart-hosting