We´ll automatically update all WordPress installations that use Safe Mode. There is no action required from you. This procedure has already started and will update all Safe Mode installations to WordPress 4.1 “Dinah”. New installations are already being delivered with the new version.
1&1 Free Mode and manual Installation
As an admin of a “Free Mode” installation you update WordPress directly in your WordPress admin area under Dashboard > Updates. We recommend upgrading to WordPress 4.1 as soon as possible to get all the benefits and improvements that come along with the new release.