probleme of username and password that don't match

hello soulseeker i used to use soulseek on windows so when i move on linux i use it too, here i have try some different linux(for now i'm on linux ubuntu studio 64 bits).the last time i have install ubuntu studio it works but now i have reinstall ubuntu studio it don't work, perhaps can i uninstall soulseek preferences but i don't know how to do this ??!!!or perhaps it' an history of port
regards ostro

ps i don't use the same name once i reinstall soulseek cause i don't remind the username i use for the last time;)