John,
I am not sure which RegCode you are referring to, but I had set the Hoster 5.08 Install Date, back to May 7th, 2012 which is just after Hoster 5.07 was released. Pretty much anyone with Hoster 5.07 could install the software.
The Install date, is what needs to be within 12 months of your last upgrade, not the Release Date. This is what allows you to get the Upgrade or not, as stated in this chart
http://www.mtu.com/upgrades/hoster.htm
Your last upgraded just expired, I will extend it, and also extend your other RegCode, that had not been upgraded since 8/07/08 to the May 7th 2012 date, so you can install this version.
Bryan