Daniel,
Thanks for the reminder. Currently there is no export/download for DJOL data. We had an agenda item to add a report writer in 2014. Unfortunately the programmer that handles DJOL has been busy with Google Calendar API v3 since August. Google decided that what worked was too old (6 years0, so they forced us to switch to a new API.
That's done, and I'll put this on the 2014 list. For now, the best way to get a backup is to grab the Android database.
http://www.companionlink.com/support...droid_database
Another way to do this is to email it. A backup is emailed when you send a log. So go to DejaOffice, Logging and Support settings, Send Log, and email it to yourself. The attached file will be the database.