The newest version of TextExpander for Mac is out with some nice improvements:

• Supports Cut, Copy and Paste for items in the snippet list
• Adds popover to resolve snippet abbreviation conflicts
• Duplicate snippets are drawn with blue abbreviation (vs. orange for conflicts)
• Adds “expand abbreviation ‘<abbreviation>’” syntax to AppleScript expand command
• Restores support for %j day-of-year macro

There was, however a bug with the updater that requires you to manually download. You can get it here.