A BETA of Elastix 4.0.0 is available today. This release is related with the project to migrate Elastix to CentOS 7.
The Elastix development team has completed the first task of the project before the estimated date.
We will continue with the schedule and we expect to release a RC in June. This work could be accelerated if we receive enough feedback, from the community, to work on the correction of errors.
The Elastix Team