You do have to re-apply the changes to the JSP when a new version is published. Therefore, I suggest you only do this change after your configuration is finalized.
If you want to check how it works, find the JSP, apply the change, open any form different from the one you changed and then go back to the form you changed. This will force Aware IM to re-compile the JSP and pick up your changes. Check if the changes work.