Hello Sir,
I am in desktop C# and VB.NET programming since 2001, also Microsoft certified developer,
I built many custom installers using C#,
One of those was downloading and installing the required files from company server,
One of those was taking care of the licencing then do the installation,
One of those was installing upon if the user is paid or free user
I am totally ready for this project,
Please contact me to start,
Regards,
amr