Advanced metronome favorites are saved on client-side. This means that they are stored as browser cookie. So be sure that you have cookie enabled browser. You can easily check it:
Opera Browser (9.64):
tools/prefs/advanced/cookies/
-check: accept cookies
-uncheck: remove new cookies while closing opera
Firefox: (3.06):
tools/options/privacy/cookies
-check: accept cookies
-select: store - until expire (or sth like that)
tools/options/privacy/private data
-uncheck: always delete private data while closing Firefox; OR
-settings: uncheck: cookies
Internet Explorer:
tools/internet options/privacy
-move slider to Medium-High or less (Medium,Low,...)
And that's it.
Enjoy