[Q] Returning M8 to stock. topic

Hello XDA.
I've rooted and installed a custom ROM(MaximusHD11) onto my HTC One M8 European edition.
I'm experiencing some trouble with wifi and bluetooth, and the battery life isn't very good.

Here's my issue:
I've tried looking for stock RUU's, but I can't find any that fit the numbers I get from GETVAR.
I already visited the thread with the European RUU .zips, but nothing matches my version number.

I'll attach some pictures showing the details:
i.imgur com/qYLpqf3.png
i.imgur com/TFmhJ13.png
(I can't attach pictures yet, it seems)

I've tried looking up guides on how to go back to stock.

Maybe all this is difficult for me because English isn't my first language, and it's still new to me - but I've been on this for a few days now.

Thanks for any help given. :)