Remove or delete Plugin

Since I don’t use this shortcodes anymore, I want to delete the plugin. But I can’t seem to remove the Easy Columns plugin. I managed to de-activate it, but when I try to remove it I get an error. After I click: “yes, remove these files and data”, I get to a blank page with the following message:

“Fatal error: Using $this when not in object context in /home/alivingw/public_html/wp-content/plugins/easy-columns/easy-columns.php on line 459”

Someone have any idea how to get rid of this?
Thanks in advance anyway!

Greets, Christiaan

http://wordpress.org/plugins/easy-columns/