please follow me to let know what is my concern, i saw the same bug at your live demo at the below link;

 

 

1) click on the above link

2) from the top most toolbar, click on insert image button, a popup will appear then

3) from the insert image popup/dialog box, please click on browse button, select any image you would like to upload from your local and then click upload button.

4) after clicking upload button, after a while files gets upload, the left side area that is directory and file listing area box gets refresh, but the right side white box do not gets refresh..... i just want that , whenever i upload any image then the right side preview box should automatically gets refresh and should display the uploaded image, hope you are getting me now..... please reply as soon as possible.