Nevermind i found it, thanks for help

I did not find it, sorry I'm kind of dumb

How?

is the master password for unlock full sync, not the account password, or they are the same?

Dont show the button "Forget your password" only for reset the sync http://prntscr.com/f7k07b

I redefined my sync, but i dont know how to change my password, i want to fix my Sync, please someone know how to fix?