Hi, it looks like keyconfig is not saved. I keep changing player 2 ⭕ and ❌ buttons to G and H keys but no matter what at each reboot (Win 11) they're back to TAB & Q keys. In fact no matter which keys I used the button_keys part in config.txt is always filled with 0's. Yet Pico-8 (0.2.6b) says "saved config.". On the other hand if I set show_fps to 1 I do get fps shown so this is the intended config.txt I guess.

In fact it seems Pico-8 saves keyconfig if it's launched straight from the .exe, but not if it's launched through a command line. I usually run Pico-8 from a small .bat file so that it opens a terminal to see those printh commands, but then keyconfig is not saved. But then I launched pico8.exe, changed keyconfig and ta-daa! config.txt was updated. Here is the content of my bat file:
cmd /k start D:\Dev\Pico-8\pico-8\pico8.exe %1