How to completely delete the plugin

I have been trying to remove the left over after I uninstalled the plugin through the normal procedure many months ago.

However, ever since then Google Web master Tools keeps telling me that I have the calendar running on my website by producing the following URL errors not found. The following is an example of the many I keep receiving.

http://www.mywebsite.com/calendarpage/action:month/exact_date:1453384800/

I get so many of them that every so ofter Google sends me a warning message to my e-mail account.

Can someone point to the right direction on how to permanently remove the plugin left over entries.

This is what I have done so far:
1)Uninstalled the plugin through the normal process.
2)FTP to the server and made sure there were no more files left in the plugin directory.
3)Delete any and all cache files from my cache plugins and in my server directory if found.
4}Check all entries in my database through phpMyAdmin.

So what else can I do.

Kind regards

http://wordpress.org/plugins/all-in-one-event-calendar/