Error: The Registration Code you entered is for a different product.
When you get this error message, you are typing in the wrong code or wrong version of code for the product you are trying to install. You will get this if you try to use a Hoster3300 Registration code for Hoster 4.0. You MUST purchase the upgrade to version 4.0 not to get this error. There is no other way for you to install version 4.0x with an old Registration code.
Error: The Registration Code you entered is for a different product. Please go to your MTU Store Account, find your order for the software being installed, click the VIEW button, and scroll to the bottom to find your Registration Code. Enter it as it appears.
Click OK to close this message, then click the Back button and enter the correct Registration Code for this product.
NOTE: Here is where you can find all of your Registration codes http://www.mtu.com/kb/index.php?action=kb&article=91