All good ideas and options! I ended up looking up the fact that hotkeys are technically stored across three different files, so I figured they'd be safe if I only deleted my prefs file (which was not included in those three files), but alas, it popped me back to fully default hotkeys anyway. But it did fix my spacebar issue, so I just set about setting up my old hotkeys again, which took less time than I was imagining. It also gave me the chance to rethink a few to more ergonomic positions, so all's well that ends well!