RoboGen online viewer down (503 - service unavailable)

[Martin Piehslinger]

Hello to the group, 

I am new to RoboGen. About half a year ago, I saw an online simulation. 

Now, when I click on "SEE IT IN ACTION WITHOUT DOWNLOADING ANYTHING!" which links to http://robogen.org/app/?demo, 

I get: 

Service Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

 I tried about a week ago, and it is still unavailable. 

Any idea when it will become alive again? 

Greetings, Martin