There are various options for calling PARTupdate:
Call up PARTupdate directly in the browser via https://partupdate.cadenas.de/login/index.
Call up PARTadmin and click on the button under Category Catalogs > Update > Online > Tabbed page Catalog update.
In both cases, the PARTupdate login window is opened initially. You can find information on logging in at Section 1.3.3.1.2.1, “ Log in/change account ”.