Dan Kinney posted on the Station Community forums:

As you may have already seen in other forums, there will be a maintenance that will interrupt your usage of Station Launcher (and the games) early tomorrow morning.

There will also likely be an update to the Station Launcher itself tomorrow as well.  We are evaluating how best to resolve the "update problem" and I expect that we will deploy an improvement tomorrow.

For information on Tuesday's downtime, see Session Maintenance and SOE Services Maintenance.

source:  Station Community Forums