WORDPRESSEXPORT  I've looked into what you said and found a small bug that would have prevented the plugin tab displaying for some users. If you goto the site you'll find a download for 0.3b which fixes this problem. This *should* solve your problem. If it still does not work then please email me on the address given on the site and Ill try solve your specific problem. Let me know if this works :D  
(Version 0.3)

WORDPRESSEXPORT  A brief user guide on how to use the plugin is now available on the site (www.wordpressexport.co.uk). Hope that clears things up. If you have any specific questions dont hesitate to get in contact. Thanks  
(Version 0.3)