Op 12-07-19 om 21:36 schreef Brian Davis:
@Andrew ParsloeI tried installing I3backend and "Reconfigure" / Restart Lyx and no dice.I also checked for article.cls and MikTeX states Itxbase is installed but LyX states it is still unavailable.Any other packages? that you may have also installed? Thx B
MikTeX comes with its own kpsewhich. You may check whether MikTeX can find e.g. article.cls by giving the command (in a command prompt window): kpsewhich article.cls
Kees