I’ve used the Yahoo!7 Toolbar before, where are my customized buttons?
Older versions of the Yahoo!7 Toolbar required you to sign-in with your Yahoo! ID to see your customized buttons.
With the latest version of Yahoo!7 Toolbar, your customized buttons are now available to you without the need to sign-in with your Yahoo! ID.
There will be a migration option to inherit all your old settings automatically. Please check http://au.toolbar.yahoo.com/ for updates.