Do I need to purchase Ultimate Addons for WPBakery Page Builder?

[M M]

Hi,

I purchased WP Bakery page Builder ( formerly visual composer)

but not ultimate addons plugin. It works fine before, but now the website yayhouse.com is very slow and its impossible to add a post, I tried to delete the ultimate addons plugin,  then the website doesn not show properly, 

Does it mean I need to pay for the ultimate addon plugin? 

Many thanks, 

[Nic Brough -Adaptavist-]

You need to ask this in a wpbakery/visual composer forum, it's not an Atlassian product.

They use Confluence for their documentation, which is why one of the help links lands here.