change config path in sql job with powershell

sql job->properties->General->Configurations->Configuration files-> change path here with powershell , how to do that

If I will open job as script and ALTER this job then it says job already exists

I can change this path by sql job ->properties itself but as admin I have to change many path on daily bases in sql job how to automate it using powershell

--Himanshu Kulkarni