LaserBoy reads and writes files from a tree of directories in the current
working directory.

You can run it from /usr/share/laserboy but you will not be able to write
changes:

    cd /usr/share/laserboy
    laserboy

This is what the desktop file do.

If you want to write files from the LaserBoy interface, first create a tree of
directories, taking /usr/share/laserboy as the source. You can use symbolic
links to reference files from this package:

    cp -rs /usr/share/laserboy ~/laserboy
    cd ~/laserboy
    laserboy