The Default App is the first screen on the right hand palette. Choose a default to get to your favorite reports, fast.
From a Project
Click Project Settings (the cog on the left palette)
Select an app from the list.
You can select from default apps, or apps available in your organisation.
From a Space
Click Space Settings (the cog on the left palette)
Select an app from the list.
You can select from default apps, or apps available in your organisation.
From Account Settings
Workspace administrators can select a default app for new projects and spaces in their org. Members can always override the default app on their projects individually.
Click Main Menu -> Manage Account
Click "Settings" on the bottom left
Select a default app for projects
Select a default app for spaces