You can launch third-party applications before or after making backups.
If you need a third-party application to be used for the task, select the "Launch external applications" item and specify the parameters you need.
Please enter a command to be executed (type in the "Command line" field). You can type a full path to an application with parameters, for example: C:\Windows\system32\calc.exe
You can also specify the waiting settings for this Command line.
Analyzing the ExitCode (return code) allows you to interrupt your task in case of failure. To use this option you must know the failure exit code.
The set of parameters to run an external application "before" and "after" performing the task is similar.