I am posting this because I experienced something similar last week.
I created a new presentation, added, edited and then reused an item from last week (a content slide with text and a calendar signal) resulting in Proclaim unexpectedly shutting down.
I am working from a MBA (specs in footer below).
Please let me know should you require any further information.
Logs attached.
Andy
4505.Proclaim.log.zip
5277.ProclaimError.log.zip