For those who use the free home version of SmartFTP, be aware that when your current version expires and you are forced to upgrade to v3 it is no longer free. There are two ways the developer could have handled this change:
1) Display clearly that it is no longer free, explain the reason why, and thank the people who have helped him by submitting bugs and testing beta releases. Software development takes time, and if he feels he's not being rewarded sufficiently, or people are illegally using the software for business use without paying for a license then fair enough, users would understand.
2) Quietly change the license page on the website and respond tersely when someone posts a question on the forum asking for clarification (or, even worse, just delete the question).
Unfortunately, he has decided to be an arse about it and choose the latter. For this reason I will not be purchasing a license, even though I've been a happy use of his software for the last 4 years and use a licensed copy at work.
If you're in the same boat I would recommend using Filezilla
instead. It seems to do most of what SmartFTP does, plus it's released under the GPL so there will always be a free, open source version available.