The demo has a customized version of the plugin where you will see two search forms on the same page to highlight possibilities. This is actually not compatible with the real plugin as of version 1.2. Only one form per page is allowed.
Change log 1.4.3
Support for product variations and some minor bug fixes
Change log 1.4.2
SKU support on the search field
Change log 1.4
- Bug fixes (post status is now correctly interpreted) - New indexing method - Ability to turn off thumbnails and description on search results