Microsoft seems to have reopened the Windows 10 preview builds shop. The Windows Insiders program is back online with a new build. 
Windows 10 build 10525 is only available to those enrolled in the fast ring of the Windows Insider program and those interested can download it immediately.
The new version comes with more color options, which Microsoft says will help you customize your desktop the way you want.
The feature is disabled by default, but you can enable it from Settings – Customization – Colors.
At the same time, Microsoft says it has made significant improvements to memory management, a new feature that helps Windows 10 manage running processes in a more efficient way, which helps improve efficiency and reduce the impact on system performance.
If you are registered with Windows Insiders, the update will come to you automatically. If you are not, you will need to enroll your PC to receive preview builds. To do this, go to Settings – Update & Security – Advanced options and enable Get Insider Builds.
If you are on a work computer, it would be a good idea to avoid preview versions.
