@koe
in thus tweak you have option to uninstall original app, like Facebook, Skype etc..

@ruplee76
Try to reapply this tweak, but write correctly this word "LIGHT", in some places you need write with small letter "light", just read the question. At the end of the questions you can see the default string like (def. LIGHT) or (def. light).. If this not help, do restore to default from this tweak (if you created backup on you first run of this app).
For solving problem with installation, read the pdf file..