Hello Josef,
I’ll add this to our bug queue to get fixed, the icon should be displayed and part of the myeclipseforspring.app contents.
In the meantime, the offline installer download app (myeclipseforspring-installer.app) does have the icon. So, you can copy the icon from that app to the myeclipseforspring.app. You can also find the icons in the com.skyway.myeclipseforspring plugin folder.
HTH,
Dave