Meta boxes plugin in wordpress theme.

Can I freely use this plugin to develop WP themes after the last update?

I have already started to seek information on this.

I have a Meta Box Group plugin, but it is version 1.2.11 (current version 1.3.4). As far as I know, it’s still a free version. What to do with it?

Use the TGM Plugin Activation script (http://tgmpluginactivation.com) to install that plugin right from the repository. No need to bundle it with the theme.

I use the plugin activator.
Thank you very much, I solved this problem a little bit differently.