PapousekI installed it, made some changes and corrections (the English version is rather poorly written to put it nicely), uploaded the files and was able to see the changes. However due to some problems with the server I had to disable it, and after that the widget was gone. After several uninstalls, directly via ftp from the server, and re-installs the widget was still gone (it's visible in the list of plugins and it can be activated, it just doesn't show). Also the changes I'd made are still there even after uploading a fresh unaltered version, so it looks like it writes something somewhere, I just haven't been able to figure out what and where. Have emptied the cache and refreshed server etc. Thank god I installed it on a test blog only, as apparently there's no telling what it does...
focusswfl