I am having the same problem, Blue Griffon not launching fireFTP. Did you resolve this on your own?
Greg,
Hi. I assume that you have recently upgraded your OS. Presumably as a result you have had to reinstall all your programs. I wonder have you the latest FireFTP add on. In the addon Manager it reports itself as FireFTP 2.0.14 My download is fireftp-2.0.14-bluegriffon.xpi dated 15/05/13 size 857KB. If yours differs that could be the problem otherwise maybe it is a problem for Daniel.