With the release of version 4.4, version 4.1 and earlier are now end-of-life.
The support structure is now as follows:
Version 4.4 - stable support.
Version 4.3 - maintenance support (only security and minor issues).
Version 4.2 - extended support (only via commercial support).
Online translation files for version 4.1 were deleted. Any further update to translations must be done offline.
Important patches are backported from the most recent version to the earlier version (such as version 4.3.6) where possible.