Officially, no – production stopped in 2022. However, the community continues to release patched firmwares based on the last official source code.
If your Skybox H1 does not respond to USB at all (no display or constant "BOOT"), you need a serial cable. Download Update Software Skybox H1 Dvb-t2
Before you rush to download the file, it is vital to prepare correctly. Failing to do so can result in a failed update, which can render your receiver unusable (a state often referred to as "bricking"). Officially, no – production stopped in 2022