What happened?

November 23, 22:34
First successful automatic landing of the first stage of my reusable rocket.

November 23, 22:37
After five days of hard work I decided to take a break. I hit save on the vizzy program. But for the entire day I didn’t press save on the rocket. I downloaded another rocket. I went back about ten minutes later and the craft had reverted back to its original save. I had forgotten to press save and now all of the vizzy is gone.

What am I going to do about it

Set my targeted release date back two to three weeks.