Hi Willanie,
Thanks for the reply. I tried a couple of things and got it working! I tried reinstalling the plugin to a different path and used a couple of random files from the 3D warehouse but the problem still stayed. But what helped was when I changed the Visualizer file name and format from the default "VIZ_" and .png. So that worked. Strangely I could even then change them back to the default and it still works. Thank you so much. such a great plugin! 
Best regards,
JJ
Hi,
I'm having problems with the plugin. When it starts it successfully changes my view to the first scene. After it's done with the first scene it doesn't change the scene but renders the 1st scene repeatedly. It saves the render after the set time but also doesn't change the file name from the Visualizer default. I get this error line in the Ruby Console: "Error: #<NoMethodError: undefined method `[]' for nil:NilClass>"
Any ideas how to fix it? I'm running the latest SketchUp Pro 2015 (v. 15.3.331 64-bit) on Win7.
Thank you,
JJ