Carl,
There are two types of RegCode for Hoster 4, one is an upgrade code and the other is a full install code. I would think you have the upgrade RegCode since you have a version of Hoster 3.
If you downloaded the Hoster 4 upgrade, you have to have a version of Hoster on your machine. If there is a version of Hoster on your machine, you do not need the old code, the software is already istalled. Use the Hoster 4 upgrade code to install Hoster 4 over your version of Hoster 3 and sll should work.
I'm an idot too, I hope this help.
Jim
