Am 31.01.2018 um 10:31 schrieb Wolfgang Engelmann:
Hi, a few questions: 1- Is lyx-2.3.1beta-1 the newest version?
No. where did you see this? The latest version is RC2 of LyX 2.3.0: http://www.lyx.org/News#item1
2- How do I use the tar.xz.sig file in respect to the tar.xz?
This is the signature file to check if the file you downloaded was not modified.
regards Uwe