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Install Venus Quickstart Package
Install venus Template Only
Here is the docs that will help you for step by step installation process of venus template
Go to the Joomla admin panel and click on extensions then click on extension manager option which will lead you through a dialogue box for browsing the template only package from your computer.
Click on Browse button and select the template bundle archive you downloaded earlier. Finally, click on upload & install.
You need to activate it by going to extensions->template manager. Now select the template and click on Make DefaultNote:(Install Helix II System Plugin)
After completing template only installation process then You need to install helix V2 system plugin and need to enable it by going to extensions->plugin manager->system- Helix Framework (you can enable it from here).