I wouldn't use a password manager system that doesn't have the ability to change the master password.
EDIT: You can't change any password really, without changing all of them (or having a separate master password). Seems unpractical as soon as, for example, site X gets its database hacked.
That is either by using the "connected version" or loosing the multi devices ability. BTW shouldn't the "connected version" be the one detailed on the home page? Sure sounds more attractive to me.
Or you have to remember the counter. Since most people just append a counter to their password for those sites that force them to change regularly, it's not really that different. :)
EDIT: You can't change any password really, without changing all of them (or having a separate master password). Seems unpractical as soon as, for example, site X gets its database hacked.