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In the Process Builder, it is possible for one to delete the existing process under the same package using the option available in the process's properties.
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Figure 1: Deleting Process
However, if you wish to delete every single process you will need to go through these steps instead:-
- Export the app to get the jwa file.
- Open the jwa file and delete the package.xpdl file.
- Import the app back into Joget and you will notice that there are no more process designs.