This is my update script:
Bash
#!/bin/bash
MAKEMKV_KEY=$(curl "http://www.makemkv.com/forum2/viewtopic.php?f=5&t=1053" -s | awk 'FNR == 243 {print $57}' | cut -c 21-88)
echo "Getting new key: $MAKEMKV_KEY"
echo "Generate new key file"
export keyfile=$HOME/.MakeMKV/settings.conf
echo "app_Key=\"$MAKEMKV_KEY\"" > $keyfile
The config file is in /.MakeMKV/settings.conf