Here are all updates, patches, bug fixes, and build info.

4.0.139

• Updating to the latest license client.
• Supports Houdini 20.0.896, 20.5.684, 21.0.631, 21.0.671, & 21.0.700 on Windows, macOS, & Linux.
• Cuda Version 12.2, Linux Driver 525.60.13+, Windows Driver 525.41+
• Released 09 May 2026
• Download 4.0.139

4.0.138

• Updated for the Houdini 21.0.700 production build.
• Fixing a bug with the benchmark node that caused it to fail on some systems.
• Supports Houdini 20.0.896, 20.5.684, 21.0.631, 21.0.671, & 21.0.700 on Windows, macOS, & Linux.
• Cuda Version 12.2, Linux Driver 525.60.13+, Windows Driver 525.41+
• Released 04 May 2026
• Download 4.0.138

4.0.137

• Fixing a sourcing bug that was introduced in the 4.0.135 build. The bug broke VDB collision sourcing. It could have ignore colliders or caused some field values such as collision temperature or collision velocity to be set incorrectly.
• Supports Houdini 20.0.896, 20.5.613, 20.5.654, 20.5.684, 21.0.440, 21.0.512, 21.0.594, 21.0.631, & 21.0.671 on Windows, macOS, & Linux.
• Cuda Version 12.2, Linux Driver 525.60.13+, Windows Driver 525.41+
• Released 10 April 2026