So I removed xscreensaver by itself with Synaptic manager, now it doesn't appear in Applications>System Tools, so I'll try to reinstall it and also select xscreensaver-gl-extra and xscreensaver-data-extra in an attempt to have xscreensaver and be able to deselect Molecules module
So I removed xscreensaver by itself with Synaptic manager, now it doesn't appear in Applications>System Tools, so I'll try to reinstall it and also select xscreensaver- gl-extra and xscreensaver- data-extra in an attempt to have xscreensaver and be able to deselect Molecules module