Not working in latest version 3.9

Hi Team,

After updating. Receiving multiple errors

Notice: Undefined index: fake_extension in … wp-content/plugins/wp-page-extension/wp-page_extension.php on line 702

Notice: Trying to get property of non-object in … wp-content/plugins/wp-page-extension/wp-page_extension.php on line 238

Would be great if i get some help here

https://wordpress.org/plugins/wp-page-extension/