SOOTHE  Considering that the last update to NF was 5 YEARS AGO and the update before that was SIX years ago, you have question the commitment of the developer to his customers...

Quite simply, even if NF 3 was the best FTP client on the planet (and it isn't), I wouldn't be investing my money in it now.

There are plenty of well supported products to consider. The crowd favorites are Transmit and CyberDuck, and of course there are the products that have stood the test of time - Fetch and Interarchy.  
(Version 3.0)

SOOTHE  Cabel, you never heard of Photoshop Elements? It's a cut down version of Photoshop for a lot less money ...  
(Version 3.1.2)

SOOTHE  Huh?

This isn't open source. Perhaps you're thinking of CyberDuck?

This is definitely not non-profit. Very much FOR profit lol  
(Version 4.5)