Help, throughout the app. • A help book in the Help menu (⌘?), 20 pages, and a "?" button in every window that opens its own page. What was wrong, and is fixed: • The storage limit deleted starred recordings once the library passed its size. It never touches a starred recording now, and says so if it cannot remove a file. • The header's LAFmax was the loudest one-second average, so a short event — a door, a drill — read several decibels quieter than it was. It is the loudest Fast level now, as the name says. • Choosing "No room measured" fell back to the last room measured. It stays chosen. • With nothing measured yet, the window showed two empty panels saying the same thing. One now. Soundproofing, measured against the laboratory: • The prediction was reworked and checked against 350 measured walls. Double-frame walls read about 6 dB pessimistic and staggered-stud walls 4 to 8 dB optimistic; both are within about 4 dB now, and the model's mean error over all 350 walls is 3.3 dB, from 4.2. • Three-leaf walls resonate where the physics says, the leaves' own damping reaches the calculation, and the curve no longer steps at the resonance. Also: correction files and measurement setups sync through your own iCloud, which the store page now says plainly; the soundproofing window's recording list groups automatic runs the way the main table does.