Enabling the Custom Desktops for users is easy. Simply create a symbolic link in /opt/thinlinc/etc/xstartup.d:
# ln -s
/opt/thinlinc/bin/tl-desktop-activate.sh
/opt/thinlinc/etc/xstartup.d/35-tl-desktop-activate.shThe ThinLinc session startup will read this file and write a ~/.config/menu/applications.menu (and possibly create symbolic links under ~/.kde/share/apps/kdesktop/Desktop if you're using KDE).
The TLDC activation script only runs TLDC for non-root users. Test your TLDC configuration using a normal user.