Can't change watch face after 10.43. Hot key selected to my usual 'Hold START' or 'Hold BACK'but no watch face change screen. Anyone can confirm this?
Try the default press and hold 'UP / MENU' - if that works, check your hotkeys. Maybe they've reset during the update. Mine are as they were though. Nothing has changed in my shortcuts / hot-keys. For watch faces I never used anything different than the left-middle button though.