OS 10.11.3 has removed this function

Fantastic to see and use - specially since Apple has removed the option
(mainly so those who have Solid State Drives do not ruin the drive) as secure delete will harm the life expectancy of machines with SSDs.
Well - I still need it. And am greatful that this company provides a free alternative.
I have tried a few other free options. Yet this one is up-to-date, simple to use - easy to understand and works like a charm.
Congrats Team and thx.

WFBF-Canada about File Shredder - Permanently Erase Files, v1.1