Note: You need Reason 9.5 or above to load VST plug-ins in Reason. For more information, please visit Reason Studios.
On macOS:
1. Log into the download page, download & install the AU/VST version of BIAS FX 2.
2. After the installation, click on any space in Reason's Rack space to load BIAS FX 2:
Effects > PositiveGrid > BIAS FX 2
3. Click it and you'll have a VST Rack for BIAS FX 2.
4. If you can't find BIAS FX 2 in Reason, please navigate to Preferences -> Advanced Settings and make sure the VST Plug-in folders have been set correctly.
'/Library/Audio/Plug-ins/VST'
On Windows:
1. Log into the download page, download & install the 64-bit version of BIAS FX 2.
2. After the installation, click on any space in Reason's Rack space to load BIAS FX 2:
Effects > PositiveGrid > BIAS FX 2
3. Click it and you'll have a VST Rack for BIAS FX 2.
4. If you can't find BIAS FX 2 in Reason, please navigate to Preferences -> Advanced Settings and make sure the VST Plug-in folders have been set correctly.
'C:\Program Files\VstPlugins'
Further reading:
Recording audio with Reason
BIAS FX 2 Plug-in Display Issues on Windows: Cut Off or Too Large