you are right, that there is a critical spelling mistake in koma-letter2.lyx:
#LyX 1.3 created this file. For more info see http://www.lyx.org/
\lyxformat 221
\textclass scrlettr2
\begin_preamble
I corrected this, but now if I try to open koma-letter2.lyx "New from template", I get:
"Textclass error. The document uses an unknown textclass "scrlttr2". -- substituting default"
So my problem still seems to be that configure.bat is not working.
are you sure, that your layout file in ~/.lyx/layouts is also named scrlttr2.layout and has the line
# \DeclareLaTeXClass[scrlttr2]{letter (koma-script v.2)}
Herbert
