[ddouglass]

Why would you need to hear from Sales? It is Support you need to be talking to to try and get the older version re-installed on the computer. Then you can purchase (on-line) the Upgrade and install it. But until you can get the older version to install then the upgrade won't help.
David Cox is the owner/CEO of the company. He and the two programmers they have are deep into getting Hoster upgraded with some new features and trying to get it to behave in Vista.
The problem with this error is it has never come up before. 0x80040703 has come up and that is definately an upgrade issue (Microsoft). That is why I had you try that first.
The only other thing I can think of would be a corrupted setup program file. Unfortunately there is no place to get another download of that version or anything even close to it that would use the same registration code. MTU does not keep copies of their older setup programs.