...
Download and install Firestorm like any other program. But when you try to run it youThen, run Firestorm. You'll get this error message:
...
Here's what you need to do next:
Click “Cancel” to dismiss the error message.
Open Finder, and go to your "Applications" folder
Find "FirestormOS-Releasex64.app"
Right-click it and select "Open"
...
Click "Open", and finally Firestorm will run.
(You only need to do this once: Quit Firestorm. We only needed to get it to run once; from now on Firestorm will run without any problems.)
You should now run Setup Kitely again, in order to let it configure Firestorm The Setup Kitely program should still be running. Quit it, and then run it again. It will see that you have installed Firestorm, and will configure it for you.