Bought the pro version. Three days later still had not received the link to download. Had to threaten to withdraw the payment and then got my link within minutes. Uploaded as per instructions. Made some test galleries, but cannot see them until they are loaded on the page. Unfortunately, the shortcode button which shows on the edit screen for pages does not work. So, I cannot even load a test gallery to see it. I sent an email off last night, and it is end of business today, no response.
The pro version comes with a badly formatted form that asks for your wp password, presumably so they can go into your account and fix it for you.
I question the wisdom of giving it to them.