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After latest Google Chrome browser update a new issue arose with menu display. 
Please, check this article https://mikado.ticksy.com/article/11648

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Activation keys for the plugins that came with the theme?

We have bought extended licenses for premium plugins that come with our theme, so you can use them for free, and we can’t give you the license codees because of policy and terms of Theme Forest. This only means that you can not update the plugins automatically, and you need to wait for the update which will be included in latest theme updates, as soon as the new version of plugins becomes available. You can read more about bundled plugins in the following Envato article https://help.market.envato.com/hc/en-us/articles/213762463-Bundled-Plugins?_ga=2.245886596.1068361229.1494855372-1438803025.1429707923