Login problem with FTP Client

I just upgraded from Smart FTP to Smart FTP client. I can't seem to login to Smart FTP Client.

1. Shouldn't it be the same username and password for Smart FTP Client that I used with regular Smart FTP?

2. How do I double-check what my old username/password was for Smart FTP? I can't even open the program anymore and I can't be sure I can remeber the username and password.