Update from 1.9 to 1.9.1 or higher

Hi,

sorry for the late update try
I updated my joomla from 2.5.x to 3.4.1
Now I ran into a frontend login problem. Seems that my old 1.9 CB is causing it.
I think I can't just update from 1.9 to 2.x, am I right?
If I am right, where I can find the 1.9.1 version?
If not, how to update? Just overwrite the old version by "installing" the new version?

Thanks in advance
Doc

Ok, I found it here:
www.joomlapolis.com/downloads/doc_details/619-community-builder-191-package

and I have installed it successfull over the 1.9 version and my login problem is solved. Now I just want to update to the newest cb version. I think I should be able to do it on my own if I search more and read more the existing informations (sorry for fast-asking-behaviour)