Yes. The compiled solver ships for Windows x64, macOS (Apple Silicon and Intel, in one universal library) and Linux x64. The same rig produces identical motion on all three, which is verified by automated tests before every release.

Blender 4.5 LTS through 5.2. If you're on an Intel Mac, 4.5 LTS is the newest Blender you can run, and SpringFX fully supports it.

Yes. Tune the motion in Blender, press Validate for PhysBones, then Export to VRChat PhysBones. You don't need to bake: the physics settings (endpoints, radius curves, colliders and angular limits) are exported.

No. SpringFX adds no helper objects, drivers or constraints to your scene, even with location springs. When you bake, the motion becomes normal keyframes and your other animation is kept.

Free lets you try rotation springs on up to 10 bones. Full adds location springs, collisions, wind, groups, presets, baking, the compiled solver, PhysBones export and free lifetime updates.

Download the latest zip from your purchase and install it from Edit → Preferences → Get Extensions → Install from Disk. It replaces the old version. All future updates are included at no extra cost.