To Delete any entities (Installation, Profile, package, Workflow, component, and whole application)
You can hover the mouse on the delete button, you will see the requirement before we can delete the entities
Now Let's get started to delete all the whole application.
Step 1. Delete all the execution using “DBCleanup.exe” you can follow this link
After delete the executions, the installation also gone.
Step2. Now you can delete package, Profiles, component, workflow
Please noted that when you delete the workflow,It may not allow you to do that since the workflow still active.
Go to process monitoring and deactivate all of them.
Then delete the workflow, After that you can delete the whole application