I was browsing the QRZ forum today and just happened to come across a thread which stated that Ham Radio Deluxe has been bought out by three US radio amateurs. By all accounts they are now going to start working on fixing lots of the bugs that are present and also upgrading the software. This is great news as Ham radio Deluxe is an absolutely fantastic piece of software that deserves the attention that it seems to be getting now.
From what I can gather the forum is staying as it is with all existing posts being left untouched, however it has moved to a new URL which can be found below. I believe that the new developers are now working on HRD V5.1 which is due for release very soon, so it says on the forum