Replace the /usr/local/bin/lxde symlink with the file, then comment out the relevant if...fi section like this:
...
...
if [ ! -f ~/.config/Desktop/terminal.desktop ]; then
cp /usr/local/share/applications/terminal.desktop ~/Desktop
fi
if [ ! -f ~/.config/Desktop/appbrowser.desktop ]; then
cp /usr/local/share/applications/appbrowser.desktop ~/Desktop
fi
if [ ! -f ~/.config/Desktop/cpanel.desktop ]; then
cp /usr/local/share/applications/cpanel.desktop ~/Desktop
fi
#if [ ! -f ~/.config/Desktop/exit.desktop ]; then
# cp /usr/local/share/applications/exit.desktop ~/Desktop
#fi
...
...
This will inhibit restore of selected default desktop icons, in the above example, Exit.
Next delete /home/tc/Desktop/......desktop and add /usr/local/bin/lxde to your backup.
Please note, you can not disable MyDocuments icon on this way.