https://www.youtube.com/channel/UCIStxZskvIOnE0371db4lEQthey changed video and email again.
Report to YouTube.OMG !!! I wished I found this page sooner. It's too late now.
I have just bought from him yesterday and was facing the same installation problem.
I have paid USD$399 and when I can't installed the file, he used the same technique saying that there is a freelancer programmer who can do it for another USD$150. I was reluctant and start browsing around if it is a scam until I found this page. He was so convincing that he said the EA makes good consistent money, thus the licensing is only available for 1 year. After it expires in a year, he will be charging $399 every 3 months. He said even the poorest customer will be able to pay for it because the EA works so well.