Changing default instance

Go to instance management

Open

and click on the icon to edit the instance:

Open

The instance edit view will open.

Open

Click on the check to make it the default instance.

This will delete the instance from the users who were assigned that instance because, from the moment it is selected by default, the instance will be accessible by all users who do not have an assigned instance.

You can read how the instances work in the following link: