-Public release of LyX version 2.2.0alpha2
-========================================
-
-We are proud to announce the second public alpha release of the new LyX 2.2
-series.
-
-With this release, LyX celebrates 20 years of existence. The 2.2 series
-has a rich set of new features compared to the current stable series.
-
-LyX 2.2.0alpha2 is the culmination of a year and a half of hard work. An overview of
-the new features can be found here:
- http://wiki.lyx.org/LyX/NewInLyX22
-
-You can download LyX 2.2.0alpha2 from ftp://ftp.lyx.org/pub/lyx/devel/.
-
-We hope you will enjoy the result!
-
-The file lib/RELEASE-NOTES lists some known issues and problems compared
-to the current stable releases (LyX 2.1.x). We strongly recommend that
-packagers of LyX on various platforms and distributions read this file.
-
-As with any major release, this one comes with lot of new features but
-also some bugs. If you think you have found a bug in LyX 2.2.0, either
+Public release of LyX version 2.4.0 RC4
+=========================================
+
+We are proud to announce the first public release candidate of the new LyX 2.4
+series. This pre-release is meant for testing and should not be used for
+serious work. For curious users who would like to test in order to help catch
+bugs before the 2.4.0 release, please back up all of your documents and be
+prepared for the worst to happen. Most users (who desire a stable LyX version)
+should not use this pre-release.
+
+The 2.4 series has a rich set of new features compared to the current stable
+series. An overview of the new features can be found here:
+
+ https://wiki.lyx.org/LyX/NewInLyX24
+
+As this release ships with new features, we strongly recommend that packagers
+of LyX on various platforms and distributions read RELEASE-NOTES in order to
+get the new dependencies right.
+
+You can download LyX 2.4.0 RC4 from http://ftp.lyx.org/pub/lyx/devel/ or
+from a mirror listed at https://www.lyx.org/Download#toc11.
+
+We appreciate your help in testing this pre-release!
+
+If a file from an earlier version of LyX is opened *and saved* with
+any version of 2.4.x, then the original file will automatically be
+backed up. The backup file will be found in the backup directory, if one
+is set under Tools> Preferences> Paths, or else in the same folder as
+the original file, if no backup directory is set. The filename of the
+backup file will be:
+ ORIGNAME-lyxformat-NUM.lyx~
+where NUM is the LyX format number of the original file. In the case of
+2.3.x file, this will be 544, but in the case of older files it will be
+different.
+
+The file RELEASE-NOTES also lists some known issues and problems compared
+to the current stable releases (LyX 2.3.x).
+
+As with any major release, this one comes with a lot of new features but
+also some bugs. If you think you have found a bug in LyX 2.4.0 RC4, either