A few months ago our induction cooktop died and took out our power. Around the same time, FriendlyWrt lost quite a bit of functionality. I'm assuming the power outage caused data corruption. It's still routing happily and running Docker too, but Samba has died, as has quite a few things in LuCi including NetData and a few things from the Docker menu.

Is there anyway to repair the installation without flashing firmware and essentially starting from scratch?

EDIT: I updated Samba through LuCi, restarted it, and that is working again.
EDIT: I manually restarted NetData:

which netdata
ls -l /usr/sbin/netdata
/usr/sbin/netdata -D

And NetData worked. And for no apparent reason, the missing items from the Docker menu came back. All is good in FriendlyWrt again!