I fully appreciate you are only doing this as a hobby and I commend you for your actions but, AeroWinx is making good money from their product, so why shouldn't you make something as well considering the time and effort you are putting into supporting them.
I was serious about my "permission from Jepessen" comment. You may find you are breaking their "conditions of use" agreeement and as such they may have cause to issue procedings against you if they have not granted you specific authorisation to publish FliteStar generated and route specific FPL's for free on the public internet. I would certainly have called "foul" if you were doing this using our system.
On a "doing business" perpective, I agree I am in aviation for financial reward and have been for 16 years, but from my companies charter ( we are a non-profit cost-sharing co-operative society...so I'm sure you can work out who pay's my salary now, No??....You do everytime you fly on any airline. ) we would be charging at cost.
It is hardly "doing business", more like providing you with a service for the benefit of the aviation community.
Whooaahh!!!