I started from the installation documentation page. From the choices given none say they are full Joomla installs. However, I did click on the second choice, "YouGrids Template". I assumed it would begin a download of the template but it took me to ten download choices mixed with "demo" and "template". I saw only one choice for 3.x: "YouGrids Demo for Joomla 3.x". One expects to be taken to a more focused page, not less focused. It was confusing.
I now see, out of the ten options, there is a "YouGrids 1.7 and UP" choice. Why not say "1.7, 2.5, and 3.x"? We all do so much reading on screen, trying to filter out quickly what is not relevant. I just scanned mainly for numbers (I have difficulty seeing).
I am not used to seeing templates that are compatible all the way from 1.7 to 3x. I have been with Joomla since version 1.0 so I've been thru a lot of template sites and template installs. Joomla is tough enough without additional UI issues.
However, my question was: what do I do now? Delete /templates/yougrids and install "Template_Yougrids-J17andUP" and "Plugin_Yjmegamenu-J17andUP"? (My experience with Joomla is to take nothing for granted. There is a gotcha lurking in every corner.)
side note: my last 2 posts were made with quick reply
After submitting my "quick reply", I was greeted with a fully loaded blank screen. Upon returning to the thread, there was no reply posted. I then felt confident there was a problem worth reporting.
This post is not a quick reply, AFIK, but I just hit "submit reply" and was taken to the same fully loaded blank screen.
Mac, Chrome 25.0.1364.172
I'm sorry we're off to such a difficult start.