Integrating Shortcodes from another plugin

Hi,

I’d like to add downloadable content, hidden behind a “Pay with a tweet” button. For example, I’d like to use the following plugin:
https://wordpress.org/plugins/wplike2get/

The plugin shortcode looks like this:
[l2g facebook=”true” twitter=”true” gplusone=”false”]here is your content to hide until user likes the content[/l2g]

How can I implement that shortcode in the Avia Layout builder?

I’ve tried it with an image element, but it didn’t work:
1) I added an image element with Avia Layout builder
2) above the image element, I put a text block: [l2g facebook=”true” twitter=”true” gplusone=”false”]
3) below the image element, I put a text block: [/l2g]

The result was: Twitter/Facebook buttons appeared, but the image element was still visible. And below the image, the page output showed the actual shortcode “[/l2g]

I appreciate, this may be a question for the actual plugin-developer instead of you guys.
Still, it’d be good to know how to implement 3rd-party plugin shortcodes in general. Hope you can help.

Thank you!