Shell script not releasing node

I am trying to setup muster to execute simple shell scripts to help with management of computers. The script is server side on a unc path which caused issues. I got it going by using a script to launch powershell, with in turn launches my actual script. The thing is once executed as a job using “shell script” – it all works but the node does not finish. Do I need to put something in the script to tell muster the script has completed executing so the node is released?

Also I can’t find any documentation on the scripts window menu item on the console. What is this for and should I instead be using this to make changes on render nodes?