Hi jachy,
Thank you for your post.
Can you please uninstall the JCKplugins and the uninstall the Manager and then finally the editor? Please re-download everything (all the packaged files) and follow the installations as below:
1. Install the latest version of the editor (version 3.3.1 +) FIRST.
2. And then install the component manager.
3. Install the JCK plugins.
IMPORTANT: Once you have installed the extensions it is important that you clean out your browsers cached files for the new changes to be displayed correctly. Please see the following link for more information on how to perform:
www.wikihow.com/Clear-Your-Browser%27s-Cache
Thanks,
P