HTTP Server 'Service Unavailable': http://update.knime.org/community-contributions/trusted/3.1/knid=01-31f20690db89fbb0/features/de.mpicbg.tds.knime.scripting.groovy.feature_3.1.0.v201602120920.jar
Thanks very much for your feedback, and sorry for the belated reply.
I have tried update for four days, but got negative results only. Another thing may be worth of a mention is that, I tried version 3.1.1 on Win7 OS, and encounted the same problem as well. Don't know why.
Are you using a proxy or is your computer behind a firewall? It looks like a network component between your computer and our servers is blockind the request.