Stuck in Dive Mode

I've encountered an interesting conundrum with my Descent. I wore it flying yesterday, and somehow during the flight bumped it in just the right way to enter the multi-gas page. From there, an increase in cockpit pressure triggered the "dive start," and I've been unable to exit the dive since. Troubleshooting methods so far have included: resetting via the "light" button (powers back on into dive mode with the clock still running), charging normally, and syncing via cord to my computer. The dive counter is going on 24hrs now. Any suggestions for how to manually end the dive shy of returning to the appropriate altitude? I'm hoping I've overlooked a simple solution.