What can I say...
Dude, I so understand!
I don't have the equipment or software to design, so I haven't made this specific error, but I've lost photography and writing the same way, sometimes even after taking precautions. I really get how sick and angry at yourself you are feeling.
You are a very talented designer and your builds are truly inspirational. Nothing can return your lost time and effort, but you are unique in skill and talent to recover and reproduce.
It’s not much, maybe, but you’ll be back astounding us again, possibly even improving upon your most recent efforts, having been through it. I am certain of this.
My respect and shared regret,
The DC