I cannot buy premium key, because hitting 'Premium' tab on your website always shows me GCA tab instead. Same happens if I hit the 'Donate' menu item.
Sorry for wrong title, but I do not know how to edit it now.
There is no bug, there are no premiums keys right now because the premium features does not work. So we disactivated the page and most links in order not to misleade people. into paying for premium.
Customer support service by UserEcho