Hi,
I only have an issue saving the addon plugins, the standard Visual Composer saves fine – is that also what you get? Here is my testing page: http://fusion.dk/visual-composer-test/
There are a couple of JS errors which are likely the cause, can you please deactivate all plugins leaving only Visual Composer / Visual Composer Addons and WooCommerce active? Let me know when you have done this.
Thanks.