From now on you need the newest updater JAR. I hate that this happened… Updater download
Bottom line: The main application is no longer a ZIP, which needs to be extracted. From now one it is a JAR file, which can be started by a double click…. Therefore the updater procedure had to be changed.
I am sorry for this change, but I am quite sure that should not happen too often ( I do not want to say “should not happen again”, but I would not know a reason to change that again…)