Hi Ken, lets start with some information on what config you have. Mac/Windows/Linux? Disk or PostGres dB? Which version of Resolve?
You say you backed up the dB but you did not mention if the original project still exists or that was deleted?
Did you export your project at the end of the job, including a ‘Grab all stills’ for every timeline. That way you would not only have the project with grades but also the stills as a reference.
Peter