Getting Application Logs
The easiest way to get Application logs is to go:
Mac : Diarly > Help > Report Issue iPhone/iPad: iPhone/iPad Settings > Report Issue.
It should bring the email window with logs attached to the message.
But if you don't have the email setup on Mac, you can go to Diarly > Help > Contact Us. There is a link which should open directory on your Mac:
~/Library/Containers/com.pureformstudio.diaryOSX/Data/Library/Logs/Diarly