Hello,
Sorry to hear you are having issues. If you go to your account product page https://store.stardock.com/myaccount/products, click on "view license keys" link under Start8 and click on that "?" button, it will list out all your licenses and the name of the pc its activated.
Currently, there is no discount offer for Start8 user.
Thanks
Basj,
Stardock Community Assistant.