Using nextgen povray editor 0.9 for windows.
The preferences dialog has two issues.
Many paths are stored in mixed format, i mean there are both slash and back-slash in the same line (default configuration, xpe just installed) and this can lead to file-not-found errors.
Further, several times in the "include" sheet i saved the povray "include" sub dir and pressed OK. Well, when i re-open this dialog the path was not saved, i just see "/" as search path for inc files. "/" is not a valid path under windows too.