As things stand, there is no easy way to propagate changes made to the base project of an application to all instances that may have been previously instantiated (https://community.dataiku.com/t5/Using-Dataiku/Updating-Application-Instances/m-p/34983). This is problematic in propagating bug fixes, updates to project logic or change of interface.
Suggest adding a way of updating application instances once changes have been made to the base project
yashpuranik