The new "Regex Analyzer" feature actually uses my existing parsing engine that I used for code completion to step through the regular expression and build a tree which explains, in English, every construct. When you click a line in the explanation box, it'll highlight the corresponding section of the regular expression.
This feature is only available in Regex Hero Professional.
By the way, in addition to this feature, there have been a few more improvements in today's release...
- Added a new menu with icons underneath the existing file menu for easy one-click access to common features.
- Moved the spot where the open & save dialogs and all of the tools appear just underneath the menu.
- Added a "split" mode where the target string is split into lines wherever a match is found.
- Fixed a bug where copying & pasting lines from a saved regular expression or target string would trim the line feeds.