I'm using Proclaim in Yosemite Beta 2 (unsupported, I know)
I started the app into today's presentation. Within the first minute, the processor started to race and the app crashed with no warning.
It appears that the crash happened when I was editing a slideshow item. I tried to add 2 new slides from files on my computer, and while I was in the dialogue window, it crashed. So far, it's happened both times I've tried, so it's consistent.
Here are the logs for your trouble shooting.
3757.cef.log
3771.Proclaim.log