Am 10.03.2018 um 21:37 schrieb Uwe Stöhr:
Meanwhile I got the report that version 4 of the LyX Win installer fails on some 64bit Windows. I am currently working on this and will most probably come up with another version of the installer that fixes this.
I could fix this now. I indeed forgot to check for 64bit MiKTeX. Version 5 of the installer fixes this and is available as usual here: http://ftp.lyx.de/LyXWinInstaller/LyX2.3.0/ regards Uwe