The new version released today has the following enhancements:
1. Improved accuracy of primary requests recognition. It is recommended to pause for at least 5 seconds between mouse clicks when recording test case.
2. Improved accuracy of replaying recorded think time. Specifically, replaying long think time on AJAX pages should be more accurate.
3. User can set test case directly from Fiddler grid using StresStimulus context menu.
New Pro edition features are described in the blog: The second May-11 Pro release. The new version is available via auto-update or here.