Retail Justine DLC issue

[Fomzo]

Hello and welcome!
Along with the new release come technical problems related to it.
So, may I introduce topic connected to the Justine DLC(non-steam version)
technical issues! Have fun!
I'll start:
I downloaded the 1.02 update including the DLC and short stories. The problem is, I don't know what to do with it. I installed it within the original game folder, but it installed itself as "redist" folder, and in my original Amnesia there is no redist folder. So, when I finished, it looked like this: E:\Program Files\Frictional Games\Amnesia - Mroczny Obled\ <-right here is the update. When I opened Mroczny Obled folder, I saw as usual my game contents, and a shiny new "redist" folder placed somewhere among Amnesia folders. After trying to launch Justine I encountered NUMEROUS starting issues[missing dlls(which I had outside redist, then copied-didn't work), main init file, menu config etc.] ending with - guess what - A SERIAL KEY REQUEST!!!
My question is: should I reinstall Update directly in the Amnesia directory or did I mess up everything and need to do I don't know what???
Any help is highly appreciated.

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C'mon guys, don't be shy, I know my English might not be so good, but help meh[exclamation mark]

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To be less confusive- the main obstacle is serial key request