Igor I have made an attempt to fix that issue in SystemEditor.

The script I used (with latest Installer-Core) is..

Installer squeaksource project: 'SystemEditor'; addPackage: 'SystemEditor-Core'; addPackage: 'SystemEditor-Squeak'; addPackage: 'SystemEditor-Traits'; addPackage: 'SystemEditor-Tests'; addPackage: 'SystemEditorBrowser'; install.

Keith