Protege-5.0.0-beta-23 is not showing OWLViz tab
<p>I am using Protege-5.0.0-beta-23 on Windows machine. I have created an ontology. I would like to visualize my ontology with OWLViz. I have installed Graphviz and from Protege -> preferences I have setup Dot Application Path (C:\Program Files (x86)\Graphviz2.30\bin\dot.exe) properly. However still in Protege GUI, I do not see OWLViz tab. Please let me know how to fix it.</p>