[Plugin: Dot html,php,xml etc pages] Plug-in stop working after some operations

Good Morning,
when:
– I upgrade wordpress
– I create a new page
– I update a page
– I change the permalink structure
the plug-in stop working. I must disable and re-enable it for get it working again. It’s an annoying situation.

I don’t have other plug-in with same function.
How can I fix the problem?

Thank’s and best regards,
Andrea.

http://wordpress.org/extend/plugins/dot-htmlphpxml-etc-pages/