I understand your justification for the pricing but you need to be wary you don't lose too many sales by pricing too high, and $65 is too high for a casual "use

I understand your justification for the pricing but you need to be wary you don't lose too many sales by pricing too high, and $65 is too high for a casual "use it once in a while" purchase for most people. Maybe you could have multiple pricing tiers such as a "Pro" version that has flowcharting tools and such? Then you could drop the price of the "Basic" version to something people are a bit more likely to purchase as an impulse buy...