I updated to .61 and then DM wouldn't sync my calendar with my outlook calendar. Downgraded back to .57, uninstalled and reinstalled DM and still can't sync. Sync window pops up and then goes right away.
It may be a little different for you, but try options > advanced options > default services and look at the calendar setting. Make sure it is set to same as your default messaging service.
Can't sync calendar
