@bez252 Actually what they describe might also work for you, based on a quick glance through the setup code.

To shutdown from the node_helper you need to change some code in the file(will be in MMM-Button/node_helper.js in your file system).
Here is an example from my module to shut down the RPi, you can replace the self.sendSocketNotification(...) in the node_helper with a similar command:

exec('sudo shutdown -h now', null);

Also, at the beginning of the file you need to include the exec function, like here:

const exec = require('child_process').exec;

@yawns

I actually managed to figure it out. The problem was in the configs for the individual modules. They were set for ´config.js´ instead of ´config.units´ and ´congif.timeFormat´. Once I changed those it worked out.

Thanks for the help though!