I had just uploaded your plug in and selected the activate option. After clicking on activate the page received a http 500 error and I am now locked out of my dashboard.
My site is currently on maintenance and I can view the website when logged in as admin, I can see the black admin bar but if I select any of the options on the bar, I receive the server error.
The website encountered an error while retrieving http://website.com/wp-admin/index.php. It may be down for maintenance or configured incorrectly.
Here are some suggestions:
Reload this web page later.
HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfil the request.