Hello, welcome you to buy the products from this site.
If you encounter download problems, see below.

Q: After I download I try to open the zip file and it tells me that it is corrupt and invalid, why can't I download it?

A: ISPs are offering less reliable service these days, when download file, you'd better use firefox + DownThemAll Add-ons.

firefox:
http://www.mozilla.com/

DownThemAll Add-ons for Firefox:
https://addons.mozilla.org/firefox/addon/201