You have already downloaded the full version of UniSudoku.
You may try it for a while and if you like it purchase at
unisudoku.com. Once you've completed
your purchase you will be emailed a user name and key
to unlock the game. Under the UniSudoku menu select
"Register UniSudoku..." and enter in your user name
and key. Enjoy!
If for some reason after trying UniSudoku you are not
satisfied please email us so we can address your
concerns in future releases of the product.