Instead of messaging/emailing Diablo try calling during their business hours. If it failed during a calibration update, they might be able to walk you though forcing the calibration again. Worst case if the computer is responding a dealer or pass-through scan tool might be able to reapply the stock calibration, but I'd try calling Diablo first.
Also how is the condition of the battery in your car? Any chance during a longer update cycle the voltage dropped too low and caused a failure? This doesn't seem to be as big a problem on the Chryslers but some of the older Fords were really pick and they used to recommend keeping the car on a good charger while updating.
Eric H. - '04 Neon SRT-4 (eBlue/S2) - '92 Dodge Daytona IROC R/T
'91 Dodge Spirit R/T - '19 Pacifica Hybrid Limited - '14 CTS-V Wagon
'08 Cobalt SS Turbo - '14 Cruze Turbo Diesel - '02 SVT Focus (S/C)
'04 SVT Focus (EAP) - '07 Ram 1500 - '81 & '85 Chevy Citation X-11
'90 Pontiac Turbo Gran Prix (ASC/McLaren) - '93 Olds Achieva SCX W41