I just recompiled all the EJS applets (totally 439 applets) with EJS4 and uploaded them to the server. (I am still running the ftp now.)
All the applets shown on the server will be replaced with version EJS 4 when the ftp is done.

But there were some error messages when I re-generated the jar files.  Please let me know if you found something which is not correctly shown.
Thank you!