Hello,
@Thunderstruck: That is strange, the address seems to work fine for others. To solve it quickly just send me a pm with your purchase email and github user name 
[MENTION=4822]Raed Abbas[/MENTION]: Due to UE API changes from 4.10 to 4.11 you won’t be able to cross compile the different releases with another version. The downloaded versions should work with any sub version of 4.10 or 4.11 respectively. If you want to compile the plugin yourself it might be necessary to create a basic code project and add the plugin files to the plugins folder of the project. Then use UE to regenerate project files and it should build fine. (A basic code project is currently necessary because to my knowledge UE4 won’t compile plugins on their own).
greetings,
FTC