Revert Tab S 8.4 to stock kitkat

I just got a Tab S 8.4 used on ebay.

I like the tab but lots of apps I use are not lollipop compatible even when side loaded.

I want to revert this Tab S 8.4 from lollipop to the stock samsung kitkat. (32gb Titanium, USA,. wifi only version)

I just found this link with instructions:

http://samsung-firmware.org/download.../T700XAR1ANL2/

Can I just download that and follow the instructions to get back to kitkat without any issue or tripping knox?

thanks.