I found a bug in my windows version. So I patched the source, to fix it.
The problem was, that qtoctave changes it’s own cwd when a file is loaded, and then the share directory isn’t in place anymore.
A fresh build of qtoctave-win32-0.9.1-2 qtoctave-win32-0.9.1-3
The new version qtoctave-win32-0.10.1 should fix these problems.
Thx Dan for the report. I forgot a “\\”+ in octave_connection.cpp line 118. I uploaded version 0.9.1-3.