Change "Default Income Account" in Item Master

I want to change the “Default income account” in the Item’s Sub-Table “Sales, Purchase, Accounting Defaults” on a whole batch of products.

The default way to do this would be to select all items in the Item List and then change a value via >Actions >Edit. However it seems that due to the value “Default Income Account” coming from a sub-table it is not accessible like this. Is there any other way exept csv import (which comes with a whole bunch of new troubles you have to go trough [as a csv import requires a lot of going back and forth until it works])

From the desktop, Getting Started, Accounting, Chart of Accounts, expand the Income tree, Direct Income, Sales , Edit. Can the account type be used for your purpose?