Erase existing File while uploading a new one with same name.

Hi,

I need your help for a simple task. When a file is still existing and I upload a new version but with the same name i'd like to erase the local copy.

Actually, CKFinder add the "(1)" prefix to the new file, so I need to erase the file first and upload the new version...

Thanks in advance for your help.

Edit : I'm running on PHP