Deleted compressor tool. Need it back

I deleted parallels compressor not knowing what it was to get extra space and now I need it back. I am trying to compact my hard disk. I have already compressed it several times but I want to reduce the size of the hard disk so it will not expand. Its at 93gb but I only use about 18-20 Gb on it.

 

I managed to get me into the very same trouble .. any ideas?