How to edit saved Library Component


I created some design and added to library. now i want to edit it like css style, js or html design and want to save it again. Currently i am dropping component to any page and then modify it and add again to library but i need to delete old and rearrange it to folder.

is there any easy way to do this?

Thank You.

Based upon the following thread, which describes the process, what you stated seems like the proper method: