Failed to create a project in the datastore. Unexpected end of file has occurred.

The datastore is captured in a future appointment (7/16/2063 @ midnight).  In some cases, it's possible that the appointment body can be truncated.

The datastore can be restored from a previous version - The steps to restore your datastore are:

1. Open Project Explorer
2. Select Tools - Options
3. Select More Tools tab
4. Click on 'Restore...' button

You can restore up to 10 different versions - I look for the largest version, the one with the most information and restore that version.