JOHNDOE7 First, thanks for the update.
Second, your upgrade policy s*cks majorly. I don't really care if this has been a complete rewrite or not (which may as well be a result of bad coding in the first place), the only thing I can see is that you're charging 12 EUR (incl. VAT) for a no-new-funcionality upgrade less than 3 months of goodwill for customers who have already paid 20+ EUR for 2.2 -- the whole Snow Leopard upgrade itself only cost 29 EUR!
You should definitely reconsider your upgrade policy.