https://wiki.lyx.org/LyX/NewInLyX24
+Especially we would like to receive feedback for the newly introduced Docbook
+export before we release it as a stable feature.
+
You can download LyX 2.4.0alpha1 from ftp://ftp.lyx.org/pub/lyx/devel/ or
from a mirror listed at https://www.lyx.org/Download#toc11.