Please use this link - https://github.com/SegenTra/Sonique-Skin-Makers/releases - to download
The skinpack file is the official untouched stand alone Skinmaker Classic for the Sonique media player.
The ssx051.exe is the official untouched Skinmaker X v.51 installer for the Sonique media player.
If the ssx051.exe file does not work, please use the Skinmaker X v.51 to find the unpacked files and move theme to the directory where you have installed Sonique media player.