To update Bastion, first of all, go to your Glitch project.
Click on the Tools button at the bottom left corner and then click on the Logs button.
Once the Log window opens up, click on the Console button at the top of the Log window.
Type the follow command in the Console and Bastion will be updated:
If you get any error while updating, feel free to let us know in Bastion HQ so our amazing support team can help you with updating Bastion.