I use "back-up software" to backup my calendar and all my contacts from
Outlook 2007. I recently had to retrieve the backup files due to a computer
failure.
All my contacts came back but I now have 2 calendars. The Outlook default
calendar and my calendar which is a sub folder of the default. I have been
unable to delete the default calendar or copy my calendar into the default
one.

I would prefer to only have one calendar. Any suggestions would be helpful.