To upgrade an existing CKEditor installation, do as follows:

1. Rename your old editor folder to a backup folder, for example, "ckeditor_old".

2. Download the latest version of the editor here.

3. Extract/Decompress the downloaded archive to the original editor directory, for example, "ckeditor".

4. Copy all configuration files that you have changed from the backup folder to their corresponding positions in the new directory. These files could include (but not limited to) the following files: