How to make set up a username and password?

Hi I'm brand new to Soulseek, so I'm sure I'm missing something simple.

So I open the program and it asks me to sign in with my username and password, but I was never given the option or asked to create a username and password so I'm not sure what I'm supposed to use.

I made an account on this site because I thought maybe once I did that I could use my name and PW from this site on the application but the application says that my password does not match, though it does work on the website (obviously, as I a posting this).

So where do I make my username and password so I can login?

A second issue I've had comes up when the app asks me for a folder I want to share (It does this even though I fail to login).
I pick my folder and it scans them all or what have, but as soon as its done the app becomes completely unresponsive, none of the buttons work, and I can't even close. Should I maybe try a smaller folder?

Anyway, any help would be very much appreciated!

Thank you

I installed it before creating an account , after reinstall old login data was saved
i removed the old user data and did a clean install with Usname from site also with Pw

no succes keeps prompting that the input is invalid

i am using windows 8
do you use the same?

so i found the sollution

after setting another username in the progam "Options->login as " username changed to andrew "real name"
it said the username didnt exist with such an password

so I changed Dré-Stylè to -> Dre-Style
and that did the trick

so no special characters are allowed in the progam :D

hope it works for you !
cheers