I have been user of SoapUI since sometime in version 3. For this reason alone I always turn on the fuature to save my work periodically, and backup my work frequently.
With SoapUI, this is unfortunatelly just part of the workflow. :(
The Auto Save feature will not help you in this case.
If this has happened to you yet, consider yourself lucky. I have used SoapUI for more than 5 years and this had not happened before. If your project file gets corrupted, so will you auto save. That is what happened to me.
As another user suggested, back up your project file(s) in source repository or other reliable backup source.
