Spb Mobile Shell Panel should be installed :)
Installer includes the necessary(new) images for your Panels-Button.
Installer: arcanev1_en for english x1-os
(installs to: /program files/Spb Mobile Shell)
Installer: arcanev1_de for german x1-os
(installs to: /programme/Spb Mobile Shell)
arcanev1.zip: if you want to manually copy the files to your Spb Mobile Shell Program Folder (extract the zip and copy the files).