The readme.txt within the .zip states:
You have to install it before the Giveaway offer for the software is over.
Does this mean if I don't get around to installing it right away it won't work?
-Ralf Maximus
Well... yes and no. The important thing is to run the activate.exe file during the 24 hour period. Of course, enterprising individuals might just run a program during this process to identify the changes that this makes to your registry. But I'll leave the why's and the wherefores to your imagination.
Like others here, I was dismayed to find myself beaten to the punch by not only sri, but tinjaw as well!
EDIT: added missing word "registry"
