Thanks for your reply. I had a good look about before posting, and couldn't find the Properties option: found it after a bit more hunting.

In regards to the other, I know I can drag and drop individual calendar entries from the archive back to the current calendar - I have thousands of entries. As I mentioned, I use the calendar as a full work diary / time sheet system, so there are often 10-20 entries per day, most days of the week. Any more thoughts on a "bulk reinstatement" of the calendar archive?