I've got something that should be of help.
Clearly Electrum imports the private key returning the address @AdolfinWolf posted.
But:

I found http://gobittest.appspot.com/PrivateKey
If I put KwFAa6AumokBD2dVqQLPou42jHiVsvThY1n25HJ8Ji8REf1wxAQb into the first editbox
I get 00BF9C46A7C40AAF96ED20CFC0AB0F929D9BE1748AF89B37E9EFB4CDB98DA6B0CB in the 4th editbox.

If I go to http://gobittest.appspot.com/Address
And put 00BF9C46A7C40AAF96ED20CFC0AB0F929D9BE1748AF89B37E9EFB4CDB98DA6B0CB into first editbox
I get exactly your 1Kxrx4WXNBF9dSzDqsJHFjdAEHo8ws1smL in the last editbox.

So alongside some numbers should be good after all, just something has change. Maybe somebody better than me can fill the gap. I'll also research a little more.


Edit: clearly don't paste the private key for the address with funds in any place that is online. That website is not mine, I googled for it.
Edit2: sadly I couldn't find more useful info; maybe somebody else can help..
Edit3: I think I've got it. New post coming.