I don't quite understand exactly what it is that you want to do but I will try to help because I too have re-installed FF before.
After re-installing you should get a screen that looks like the original setup screen....there should be two options..choose the bottom one and it will take you to the opening screen of POL and you should be able to input your User Name on the top line...then you should see a section where there are two boxes where you will input your POL account number and then you need to input your password on the second line. To be able to input the password you have to select the second option in the drop down box right above where you need to input your password.....
Anyway I hope that is what you wanted...if not let me know
