From CraftEdge forum
ProvoCraft has recently put out an update for Design Studio which if used, requires you to update the firmware on your Cricut to 1.3 for the original and 2.3 for Expression machines. Sure Cuts A Lot is currently not compatible with the new firmware, so if you plan on using Sure Cuts A Lot, do not update your firmware yet. If you did, you should be able to use the older version of Design Studio to put the older 1.1 or 2.1 firmware back on your Cricut.
Older version of CDS
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---------------------------- Provo Craft is playing their silly games again and the new update disables SCAL. Todd is working to unlock it AGAIN so it will probably be a couple of days until he fixes it. I would hold off on updating CDS until the new patch comes out.