GrabCAD - Update Firmware
In GrabCAD first select the printer:
Then go to Settings:
If the printer firmware is out of date, it will look like this:
Click on the orange banner. Then you will see this:
It may take a minute for this orange button to become available, click on it, then go to the printer and select Maintenance / Update Software:
After that the printer will show that the update is Verifying and then Updating. This can take up to 15 minutes.