Some users have had the Helix Native VST3 plugin file blacklisted within Cubase. Here is some troubleshooting info that may help. Be sure to try these steps in the exact order:
1. Uninstall the plug-in binaries and resource files, shown below
2. Launch Cubase so that it can clear it’s plugin cache
3. Quit Cubase completely
4. then reinstall Helix Native, latest version from our downloads page:
You will need to uninstall Helix Native by deleting the plugin files listed here:
Plug-in Binaries
/Library/Application Support/Avid/Audio/Plug-Ins/Line 6/Helix Native.aaxplugin
/Library/Audio/Plug-Ins/Components/Helix Native.component
/Library/Audio/Plug-Ins/VST/Line 6/Helix Native.vst
/Library/Audio/Plug-Ins/VST3/Line 6/Helix Native.vst3
Plug-in Resources
/Library/Application Support/Line 6/Helix Native/da
/Library/Application Support/Line 6/Helix Native/res