Log out of a node in the desktop app, but keep is displayed so that you can log in again.
Step by Step
Go the home dashboard, which is the default when the app opens and can be reached by clicking on the ‘Home’ icon from anywhere else.
Find the top bar for the node you want to edit.
Click on your user avatar.
In the dropdown click on ‘Logout’.
The node will stay configured in the desktop app, but show that you are ‘Not logged in’ with ‘Username’ and ‘Password’ fields for you to log back in with.