Recalculate links

Good afternoon,

I recently made a copy of my default.aspx page for my top level site and when i changed the name of the old default.aspx page a message came up, do you want to recaculate all links, now unfortunatly my top level site and all child sites are using the changed defaultold.aspx page, is there a way to recalculate all links to use the default.aspx pages for all sites.

I'm using Sharepoint 2010 enterprise.

Thanks,

Art