I think this should work. Run this from a command prompt.
Code:
java -jar C:\Users\USERNAME\AppData\Local\GRIP\app\core-1.2.0-all.jar [MY_PROJECT.GRIP]
You should get something like this:
Code:
Loading Dependency Injection Framework
Feb 08, 2016 11:01:56 PM java.util.logging.LogManager$RootLogger log
CONFIG: Configuration done.
Feb 08, 2016 11:01:56 PM java.util.logging.LogManager$RootLogger log
CONFIG: GRIP Version: 1.2.0
platform: /Linux/amd64/
Feb 08, 2016 11:01:57 PM edu.wpi.grip.core.Main start
INFO: Loading file test.grip
Feb 08, 2016 11:01:57 PM edu.wpi.grip.core.Main start
INFO: SUCCESS! The project is running in headless mode!
Feb 08, 2016 11:01:57 PM edu.wpi.grip.core.PipelineRunner$1 startUp
INFO: Pipeline Starting