miniclock.example.cfg is just the example file, so it won't overwrite customized miniclock.cfg everytime you update
save it as miniclock.cfg to actually do anything
should say so at the very beginning of the file itself
Code:
# -------------------------------------------------------------------
# MiniClock config example file. For settings to take any effect,
# copy or rename this file to .addons/miniclock/miniclock.cfg.
# -------------------------------------------------------------------
...