Opazity costs US$ 49.95 (or equivalent in your own currency)
Opazity runs on:
Any Windows PowerPoint (including 32 and 64-bit versions) from PPT 2000 onwards.
If it doesn’t work on your setup, let me know for an immediate refund.
More videos on the Opazity Support Page show how easy it is to use Opazity and will give you many more ideas for using it!