Dear disler,
Most aspx files are clear source code, you can modify them and control the look and feel. you can also refer to the development document which can be found in
http://phpfileuploader.com/document/ .
The Source code license includes the full C#, ASPX and Java Script code of the control. It includes all of the benefits of the Enterprise license and Redistributable license and is best for companies that plan to modify the control or simply wish to have access to the code for security reasons.
Regards,
Eric