Not going to lie, I'm having the exact same issue with the clocks. I'm likely just an idiot, but I can't figure out how to edit the clocks either.
You almost certainly are doing this already, but just in case... Be sure to be using your own copy of the database, or you won't be able to edit anything. :)
It turns out I'm just a huge idiot, and I was mistaking the Airtable database for the VTT Lite.
LOL. NO worries :). Glad things are working for you now!