What Windows version and SketchUp version ? EDIT. Nevermind, just go to this post from last Thursday, 1st of May: Re: get registry string from ruby 2.0 (Also works with older versions, if user has the old "win32ole.so" file downloaded from the Plugins forum [link shown.])

ok, my mistake i saved some values by write_default, at the start the plugin get them by read_default and in these values i had some non-utf-characters i changed the values and now it works like before Frank