Hi,
that was the very first version which actually did have no recaptcha and did have the captcha options as you describe.
This version even doesn't support the Joomla! auto update feature which I implemented with Visforms 2.0.0.
I think you should consider updating to the most recent version. You find the downloads here:
www.vi-solutions.de/en/downloads-visforms
You would need the download of Visforms 2.1.1 if you are on Joomla! 2.5
There are lots of new features that came with Visforms 2.0.0 and with Visforms 2.1.0
And the documentation is for Visforms Versions greater or equal 2.0.0.
I strongly recommend that you make sure you have a full backup of your Joomla! Website before you run the update and that you test on a localhost if possible. Please have a look at the release notes of the downloads too.
Kind Regards,
Aicha