Hi
Basically the program is the same i.e. AnyDVD & AnyDVD HD.
It is the key that differs.
During trial period it's fully functional inc the HD side.
If you have/use a AnyDVD key then the HD aspect is greyed out.
The upgrade 'key' unlocks this (the whole program in fact).
With regards to 'old' key, at present. That remains valid/usable (I currently use both). Whether that will change in the future is anybodies guess.
Apart from slysoft of course.
The above beta, if you've got 64 bit OS is still worth downloading (apparently). If your using the AnyDVD key only HD aspect is disabled.