Survey: textfield after multiple choice?

A presales-post mentiones the possibility to have a multiple choice question with the last answer called 'Other' and put a textfield next to it so they can fill it themselves.
For example:
What is your favorite sport:
0 Football
0 Tennis
0 Basketball
0 Other:

Because I need this option I just bought your survey extension. After installing it I cannot find this option to add a line of free text to the last “Other” answer of a multiple choice question. I only found free text as a separate question, but this is not what I mean.

Could you please explain how I can add a textfield next to the “Other” option?

In case this option is not possible can I receive my money back?

Thank you,

Flexus