I know Larian usually has a pre-set summer vacation (they aren't really big enough to have people off at different times), but they specifically said there should be another beta this coming week...
Maybe when they pushed back the release to Aug 6th they didn't change the email auto-reply settings?
I'll email the person who handles most of the support; even if he had plans that couldn't be cancelled, there would still be someone there who can deal with this.
You will not have to wait a week.