Hi, I need to upgrade Buildingworks.co.nz which is currently Joomla4 to become Joomla5. It is running Ultimate template version 1.3.17 and UiKit 3 Framework plugin version 3.5.30.

I think Uikit framework plugin 3.5.30 is not compatible with Joomla 5. So do I deactivate and uninstall 3.5.30 and install the version for Joomla5?

What about the Uikit accordian version 1.2.3 and Uikit 3 Grid version 1.2.3. Will they work in Joomla5 or do I need to replace them? 

And the template version is ok for Joomla5? Ultimate version 1.3.17?

Thanks.

Of course the templates work with Joomla 5. That's what we stated. We have adapted the UKIT plugin for Joomla 5 and no longer requires the downward compatibility plugin. If you have migrated to Joomla 5, install the UIKIT4 plugin. Uninstall the UIKT 3.5.30 plugin you were using until then and then activate the UIKIT 4 plugin. 
Activating both plugins at the same time is not possible.