32 bit app not working

I had the photo browser app ACDSee running fine in Lion. I've upgraded to Mavericks and it no longer works. I click on the app in launchpad and it starts but disappears about a second later. I've gone to 'file info' and found there is no checkbox option to run it in 32 bit mode. System info says it can only run in 32 bit mode. Is there anywhere else in the system I can ensure it runs in 32 bit only?