I have difficulties with the MIKADO vocabulary updates (often timeout).
MIKADO uses the SeaDataNet common vocabularies web services to update its lists of values. If there are any network problems, MIKADO detects them and does not check the versions of controlled vocabularies. You will have an error message but it will be possible to work off line.
If you have difficulties to connect the SeadataNet webservices (often timeout), check if your computer is behind a firewall and if this firewall can stop the connection of MIKADO to external webservices.