Like I few others I had the problem to install the latest version of this plugin. The administration panel didn't show up. I turned out to be a problem with the rights of the WP user in the wp-config.php accessing the MySQL database. Acunetix pointed out, that it must be necessary for this user to create and alter the database.
As a matter of fact my user had these rights and it still didn't work. I had to give the user the global rights to create and alter databases, then the plugin worked. Of course this is a big security issue and I'm not willing to grant a plugin access to all of the databases of my MySQL installation.
@Acunetix Why does your plugin need global rights? Or is this simply a bug?
P.S.: I run a couple of plugins who create and alter tables in the database of my blog. But only this single database!