Quote from: Erix on Today at 10:10:06 AM

In order to retrieve my btc, bought on december 18th 2013 I found out I will need the Electrum wallet 2.9.8.
I first tried to install 2.9.6 but hat version did not run. Nor from commandline nor from the gui. Btw I also installed Python 2.7.
How / where can I get the Electrum version that can handle the 17 word seed from 2013?

Firstly just like others have said, you need to download the latest version of Electrum now if you are not used to technical stuff like Phyton and the rest then you can proceed to make use of the raw complied exe format from the original ELECTRUM website.
ELECTRUM currently (that is if you are using any of the latest versions) actually supports addition of custom words to your seed phrase. I'm not too familiar with older versions of Electrum but you can actually make use of custom words on recent versions.

What you have to do is input the seed phrase I'm addition with the custom words separated correctly with just a single space. If it's correct then Electrum will give you a feedback that it's a valid check sum and tell you what wallet format it is.

Quote from: Erix on Today at 02:51:32 PM

Thanks! I already tried that but I get the error the 4th and 5th word of the 17 words seed seem to be wrong. I think here they use BIP39 however my seeds seems not to be of that type.

Is it possible you made use of brain wallet?