Migration from Openfire 4.2.3 (windows server 2003) to Openfire 4.7.3 (windows server 2012)

Hi Guus,
Thanks for your reply. Currently the error of the openfire now is below:
"Found old database version 4 for monitoring. Upgrade to version 6.0
Error while loading plugin “monitoring: Database update failed. Please manually upgrade your database”
How can I manually upgrade the database? thanks