Application Exist:
This activity helps to check whether the application is available currently on the desktop.

How to use Application exist?
1.    Open a project.
2.    Search for Application exist and drag and drop it to the workflow.
3.    Double click on the activity and select active application.
4.    Hover over the application and click on it.
5.    Now, execute the workflow.
6.    You can add Launch application next to the activity if the current application is not available.

Technical Reference: