I'm afraid the best solution is to be in the habit of hitting the "save" button after each successful take or after around 10 minutes of editing.
While editing you could enable the "auto save" feature as well. I didn't like using the auto save function in Producer 8.5 while tracking as I had my audio engine cut out from this, but that might be different now. So I still keep my manual saving habits.
Also while were on the topic you will also be better off to perform a "save as" before closing down the project. Point the file to your back up drive.