the old YJSG 1.0.13 website demo contained an elaborate example of the Mega Menu.
The YJSG 1.0.14 documentation and demo is mediocre in comparison and doesn't fully explain what you had setup in v1.0.13. You've completely deleted the YJ v1.0.13 demo, template demo package, and docs from your websites. There's no way to go back and look it up since I didn't download the .13 YJSG demo.
It's not the end of the world if the old 1.0.13 grids is unavailable, but without the elaborate mega menu demo I can't set it up the way you used to demonstrate it.
Forget it. the J1.7 DEMO v1.0.13 is still available and the exact same thing.
I would like to know however if it's safe to upgrade the v1.0.14 mega menu plugin without uninstalling the old v1.0.13?
If I uninstall the old plugin and install the new one there shouldn't be any issues should there? No data disappearing and such?
Are you sure your are posting in product assigned forum?
What is your CMS version?
: Joomla 2.5
Link to installation
: i r r e l e v a n t
Have you edited any files? If yes tell us which ones.
Is this personal or client website?