unset the path for the library used by FullCalendar I am using FullCalendar module to display some events. I had to modify the design of the calendar and the only solution was to alter the way javascript of fullcalendar displays events and so . Now i do not want that at an update of the fullcalendar, all the changes i have made to dissapear.My question is how can i unset the path of the current fullcalendar library and set the path to my own customized library ?
When you update a module what ever changes you have done would automatically be over written. if you have just made changes to js then it would be better to add that JS to your theme rather than the module itself. 

You could you the hook_js_alter (On Drupal 7) or jsalter (On Drupal 6) in yout theme to remove the module specific js.