waste of time and money

it is just a wast of time and money, the app does not fuction as described. it does not complete the scan on duplicated file, just freezes. does not show all apps on my macbook. some apps I want to delete it does not appeares on the scanned window, does not help at all. I wish I know how to ask for a refund and just delete this app.

Drake--0 about Disk Aid: System Cleaner, v1.2