The server is now updated to 1.6.1. The Server Launcher does not work with the new Minecraft launcher (due to either lack of features or lack of documentation, I can’t tell which yet), so if you were using that to launch the server from the web, you will need to use the actual launcher. Sorry.
Thanks for playing on the server and not spamming me too much about updating! I hope there are no big issues with this build, but if there are, I apologize in advance.