How did I get 30-day trial version?

I am using SmartFTP for personal use, but I just got a popup saying I've been using it for 32 days and do I want to buy it? Is this what happens with the free version--every so often you get a purchase reminder? Or did I somehow download the business version?

its just some reminder that you could honor the work of the smartftp developers with buying a license.

it is randomly shown only in normal work time iirc.

darix