Sitebulb has a range of 'global settings' which act as the default settings for every new audit you start. From the Dashboard, choose the 'Settings' option from the left-hand menu.
From here, the 'Google Accounts' tab allows you to see which Google Accounts are currently authorised to collect data using Sitebulb.
The only thing you can 'do' on this page is revoke the Google account access, by clicking Delete alongside any of the accounts.
If you click this, you will be shown a warning box overlay, which tells you how many projects currently make use of the authorised account, along with a few example projects.