I've had version 10 for a week or so and am enjoying it a lot. Unfortunately, I've ended up with multiple copies of some of my patterns and I can't figure out how to delete the duplicates. Is it related to my saving things every ten minutes? Any suggestions?
Saving every 10 minutes will not cause duplicates as far as I know. All that does is make a copy of the current pattern with the same name and the backup form of the extension.
Multiple copies are treated like any other Windows files - manually deleted by you from Windows Explorer.
You may have done some "Save As" or "Save" telling it to make another copy. That could well be the cause of your duplicates. Remember, you can tell the system to make a backup every so often. I think the default is 30 minutes.