Dear Sires I use Lyx since 2009, and the next problem is new to me: If I open a new document the class of document is "KOMA- script book" and LyX does not accept to chsnge to any other class of document, say "article" or "KOMA-script article". The buttons "OK" and "Apply" turn on inactive.
I have installed the files with the default document classes in LyX I started LyX from a terminal, via "lyx -dbg all I reinstalled LyX with Synaptic (My OS is Ubuntu 15.04) The problem remains. Maybe is something plain, I don't know. Anyone could give me a hint or better a way to solve this problem? Tank you for your attention. Eugenio
