You have a "compare" but I fail to see the difference between Professional, Corporate, and Technician.

"Technician" says you can fix an arbitrary number of computers, but asks for number of computers on the purchase screen?

If I buy any version of Spybot 2.0, what kind of DRM does it use, and how will it limit my use of the product? I need to know this before spending money.

Finally, your site appears to now be commercialized... you are now selling a product that has been "tried and true" and free for well over a decade. But, you still have a "donate" links prominently displayed all over your site. Personally, this really rubs me the wrong way.