IMO - With the trial version letting you convert 100 files, and with a price of $399 this product’s targets audience is a business user not really an individual.

I wouldn’t feel bad because:

«» You never would have bought it to begin with at that price
«» You didn’t hack the program to steal what you needed you took what was free

It sounds like you were happy with the program and I have a feeling you might recommend this product to anyone in the business world (or someone with a lot of money and a need) so that’s good PR for the software makers and word of mouth sells. In the long run you might provide them with more than just your $399.