Hi, robbi466.
How did you install VLC (source details)? That should also help us answer the repository question.
Zorin’s version is 3.08 which you can see under Synaptic. The package versions under Synaptic are the versions tested for stability on Zorin. That can be one of the reasons why you’re seeing problems with 3.0.11. Can you install the 3.08 (after completely removing 3.0.11) and then try and see if the Renderer function works?