master password

I need help changing the master password. I thought I wrote it down but I cant find it anywhere. I know its a rookie move but now I cant do anything, no downloads , no changes, nothing. Is there a way that I can access it by any means possible!! Its making me crazy!! :o
Please please help!!! :-\

If you have lost your avast password … there is only one way…reinstall

www.avast.com > support > downloads > uninstall utility

Hi! That is a problem because I need the password to take it off :o

not when using the uninstall tool from safe mode…

Ill try that