We suggest you do NOT update to Joomla 3.8.10 until we can resolve an issue it causes with caching in Fabrik. If you do install it, you'll need to disable Joomla's "System Cache" in the global System settings.
Apologies for the recent server outage, a planned migration by our host provider to a new location turned into a bit of a nightmare.
Creating a custom visualisation template
Visualisation templates can use custom templates.
Templates are located in ...\plugins\fabrik_visualization\xxx\views\xxx\tmpl
Don't adapt Fabrik templates (modifications will be overriden by the next update)
Copy the template folder you want to use, adapt, select this template in the viz settings.