The Quantum Theme for bbPress has been updated to version 1.6, with many bug fixes, updates related to GD bbPress Toolbox Pro, many more styling improvements and one more theme colour style.
This version improves support for the GD bbPress Toolbox Pro specific features and adds extra styling for some elements. I recommend updating GD bbPress Toolbox Pro to the new version (5.8.3 was just released) because it adds a few more Quantum Theme related templates.
Finally, Dev4Press Support Forums now use GD Quantum Theme Pro for bbPress, and you can check it out here, and also read more about the switch in the blog post here.
Work has begun for version 2.0, that will be released next month. In the past few months, I received a lot of suggestions and, most of them will be implemented in the next major plugin version. It will include many improvements to main SCSS files to allow for better flexibility when it comes to colours and other parameters. Finally, the plugin will have customizer options for selecting any colour for various elements, making it even easier to customize and integrate into different themes.
To see the list of all the changes in this version, please check out the changelog. If you find any issues with the new version, please, report them in the support forums.