

Note: Backup your files before upgrade.

Updation Steps:

1. Delete this folder from your server completely
  ->  "/admin/js/plugins/ckeditor/"

2. Goto this folder: "Upgrade/v1.4 to v1.5/Upload"

3. Use your Server FTP or File Manager application on your server. 

4. Now, replace old files directly with new files present at upload directory.

You have done the work! 