Unless you resolve the bugs in cache handling, this product is ineffective. I waste too much time debugging your cache handling. When I have a problem, I do NOT know if the problem is a bug in cache processing or a bug in my software. Counterproductive! I would not accept this in a shareware product, so I cannot accept it in a product I paid for. Your 7-day trial limit is the cause of this. It should be 30-days. That is more realistic. However, I realize what a dent that would put into your sales.
The support has been poor and I can't even be assured that the product is under active development to fix such bugs as the cache bugs. It does not give me a very warm and comfortable feeling. You should have released this product as shareware.