Let me try to upload ejs jar file!
The file was not uploaded when I first tried it. However, I was able to upload it the second time.
I am aware of this problem: the file was not upload successful every time. But I was not able to find out the bug (The problem did not happen every time, so it is difficult for me to fix it).
Please try to upload your file again if the simulation was not show up.
And you have to save your file under users/ sub-directory, otherwise, it would not work, either.