Album of photos disappeared after Photoshop froze and iMac was restarted!

A complete album dissapeared after Photoshop became unresponsive and restarted my iMac. I was a at the moment just working with a simple mask on a photograph... Photoshop has been crashing often on a daily basis and sometimes more than once, but making disappear a complete album is simply unacceptable. The biggest issue is that I had downloaded the photos using Image Capture App and erased them after downloading finished using this same app, so I cannot find a way to recover those important and unrepeatable pictures. Any help or solution? thanks