Do I need to pay for a license when updating from an old version to the newest version of BeTheme
No - updates are included with the original purchase
I have several 16.3 installations. How do I properly update them to the most current edition?
Check the documentation. https://themes.muffingroup.com/betheme/documentation/
You can use Envato Market WordPress Plugin. This plugin helps customers receive updates to their premium wordpress Themes & Plugins purchased through Envato Market (ThemeForest & CodeCanyon).
you can download the plugin from here:
Using this Envato Market WordPress Plugin you will see:
- Latest version (need to update version) number
- Details view option for the latest version
Note: Better to keep a full backup before update done