GD WebFonts Toolbox Pro 2.6 is a new major release of this plugin. The new plugin version is tested with upcoming WordPress 4.7 and includes support for TwentySeventeen theme.
The list of Google fonts is expanded, and now it includes 809 fonts. URL for Google Developers API Key page is updated. There are few more minor updates and fixes included.
If you find any errors, please report them in the support forum.