Progress gone in Harmony Elements trial version

Last night I started a project on the trial version of Harmony Elements. When I tried to reopen it, it shows 60 blank frames and two layers: “sound” and “drawing” (I had four layers with different names). I also had about 300 frames on the project I started. In the project folder all of my drawings, audio, etc. are still intact but I can’t get them to show up in the actual Harmony program.