Hello,
the plugin is disabled when you install it on a website. If you did not enable it and there was no error on install, this is not due to the jQuery Easy install, I am afraid.
By the way, I went to your site and everything was fine. Even the admin console login shows up.
Is your issue fixed?
The plugin does not have any influence in the admin console for Joomla! 3, which you appear to be running.
Let me know what is the state of your issues!
You can also remove the plugin from the database manually and the files with a FTP connection from the server. No extra files are installed other than under the 'system' plugin folder.