Dear chein ..
Please proceed as following:
1. Install SmartFTP on your laptop by going to: https://www.smartftp.com/download
2. Activate SmartFTP with your license key. Run the automatic license key setup which automatically install the license key. You can resend your license key email at: https://www.smartftp.com/purchase/lost.php
It contains a link to the license key setup.
I hope this helps.