Root / Rooting Xperia E4 (E2105) with firmware 24.0.A.5.14, with SuperSu

Root / rooting for Xperia E4 (E2105 'Jasmine')
EASY ROOTING PROCESS + REPLACE KINGROOT WITH SUPER SU!!
[this procedure might also work with E4g and E4 Dual but I have no way to verify it]

I'm starting this thread because I followed other methods, without success, and this process worked for me (5th September 2015) and it's relatively easy to do.
It succeeds in rooting the latest firmware (24.0.A.5.14) and replacing the KingRoot junk apps (which I don't want on my phone) with SuperSU
I have a Xperia E4 (E2105) and a PC running on Windows 7 (64 bits)

before anything else:
-- I backed up all my important data/info/photos/messages/chats/etc.
-- I went to Google Play and bought Super SuMe, but didn't install it, they advise to only install it AFTER you gain root with KingRoot. The developer has a thread here in XDA where you can get the APK for free(?), but I'm not sure if it's the latest version, and I wanted to support their work so I paid for it.

Now, my steps to root the E4:
You might want to skip to POINT 2 if you already have the latest firmware (24.0.A.5.14)

-- I downloaded and installed Flashtool. Started flashtool (not 64 bit, just the 'normal' 32 bit flashtool)
-- from inside Flashtool I ran Xperifirm and searched for a 24.0.A.5.14 firmware (the latest one, at the moment) for my phone, in the geographical area of my choice


-- flashed my phone with the chosen firmware.
-


POINT 2
-- after flashing the firmware to your phone unplug the cable, turn the phone ON and acquire 'Developer' status: >> go to the phone settings/About phone/scroll down to bottom and press 'Build number' 10(?) times
-- go to the previous screen into the new "Developer options" menu and check "USB debugging"
-- Now on your PC go to the KingRoot site and download their program for Windows (I tried using just the APK on my phone but it failed to root it, the Windows program was successful)
-- KingRoot might install garbage on your PC (or worse) so it might be a good idea to create a restore point in Windows now, that you can revert to after using and uninstalling KingRoot on your PC
-- After installing it I started KingRoot on my PC and connected the cable to my phone. When KingRoot recognized my phone it showed me on my computer screen how to allow for debugging. You follow the instruction (you press 1 button on your phone) then on your PC you press the button to Root and wait. In my case it worked at the 1st try, but my phone restarted in the middle of the process.
-- After it told me it had rooted my phone successfully I unplugged the cable, went to Google play on my phone and downloaded/installed the Super SuMe app (which I had bought earlier)
-- Super SuMe has to be started twice (2 times) to fully work. So start it once, wait for it to close, and then start it again. My paid version of Super SuMe worked. If you downloaded the APK from the developer thread on XDA make sure you already have the APK available on your memory card, ready to be installed.
-- I was even able to update SuperSU successfully (I've read in other threads some people complaining they couldn't do it)
-- So now I have the latest firmware (24.0.A.5.14) on my phone (Xperia E4 E2105), it is rooted and I have the latest SuperSU :D yay!

I'm an Android Noob and probably won't be able to answer queries that some people might have.
I'm just posting this method because it worked for me and it was fairly easy to do, so it might help someone else in my situation and without much technical knowledge.