How do I get my license key I purchased

I made the purchase

Order Number : 205504316399

Open Media LLC ( http://www.4kdownload.com )

Contents of your purchase :
Vendor Product ID : 101
Product Name : 4K Video Downloader
Quantity : 1

Total : 9.95 ( USD )

Billing Information
hector rodriguez
IP: 99.169.4.235 IP Location: Miami ( United States )