We (WarpTheme), Joomlead or other template provider are partner with Themexpert about Quix license.
We can INCLUDE Quix PRO version for quickstart package BUT we do not have permission to implement the license for the package.
So what happen if new quix version release?
There’re few ways to update quix
1. Purchase you license from Themexpert so you can update direct via Joomla back-end
2. Request us provide latest package to update, we can provide the latest package for you to install or we will update the package for you if you provide joomla administrator account.
If you check our changelog for any template that using quix, you can see that we are using latest quix version 1.9.2 and updated all package to the newest version like Joomla core and other joomla modules/plugins, not just QUIX
This is not a BUG and I hope you understand about this case.