The root post has been updated with a version of the TitleCase script enhanced for Opus 12.
This version adds checkboxes to the Rename dialog to control the script's options:
It also handles multi-part extensions better than before (e.g. .part1.rar files).
I've consolidated and cleaned-up some posts in the thread to make things a bit easier for first-time users. Bug reports that have been fixed in the root post have been removed, etc.