As far as I'm aware, the installation of Styler and Editor are identical. It is only how the editor.exe application is invoked which causes Styler to kick in or not.
What I would recommend you explore:
1. Install Arbortext Editor only, on all desktops
2. Add a separate shortcut to Arbortext Editor for each user, but rename it to Arbortext Styler
3. For your Arbortext Styler shortcut, just add " -styler" (without the quotes) after the editor.exe application call.
4. Default file associations remain with Arbortext Editor, when user wants Arbortext Styler, first quit Editor then relaunch via the Arbortext Styler shortcut.
