Error in results management

After several months of use, comes the following error when filtering a day:
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 7680 bytes) in /web/htdocs/www.faenzacalcio.it/home/wp-admin/includes/plugin.php on line 839

http://wordpress.org/extend/plugins/leaguemanager/