If you click on the little icon on the upper right corner of the screen, you are taken to the menu that allows you to:

You can edit certain values of your business management system, or you can change your business management system if you are migrating from one system to another.

Signing out allows you to sign in with another user, and changing the profile takes you to your profile page.

Plunet vendor portal owners (i.e. not the SLV - their customers) need to register their portal in BeLazy using their API data because of technology reasons, otherwise BeLazy cannot connect to their portal. Please read the Plunet portal registration article under Integrations / Vendor portals in the knowledge base.