[help] phone stuck in bootloop

Okay so some of you might know that there is a ram management fix for the Samsung S6 by editing the build.prop file. I tried doing it and my phone went into a boot loop(it just repeatedly show the white text of SAMSUNG GALAXY S6). My phone is rooted by the ping pong method which doesn't trip knox. The last 2 things I want to do is go to a samsung store or flash a stock rom which wipes my data.

I saw a video that you can fix it by using adb. However, when i plug my phone in my pc while my phone was in recovery mode, the pc doesn't detect. But if my phone is in Download or just its boot loop mode, the pc detects but it often says "Your last device is not recognised or malfunctioned" or something like that. Yes I do have drivers installed including Kies3.

All I want to do is just to fix my s6 build.prop file without
1. Tripping the knox,
2.Not visiting the samsung store
3.Factory resetting my phone and flashing a new rom.

Please help. Thanks

*********EDIT***********
I found out that you can flash a zip file that restores the build prop file here:

http://forum.xda-developers.com/show....php?t=2212168

It's one of the replies to the post.

But I'm an odin noob so... how do you flash it???

***********EDIT AGAIN*********************
Okay... soooo I'm stuck now. I can't even get my s6 to connect to my pc. It just says usb device not recognised.
I already tried:
-Redownloading samsung usb drivers.
-Installing Kies3
-Installing Smart Switch then clicking more and reinstalling usb drivers.
-Using different port.
-Using different wire.
-Blowing into port and phone port to clear debris.

Help :/