The latest Bluefish444 Driver Installer package can be downloaded below.
        
          
                
                            
                        
              Windows Driver Installer V6.6.1
              October 17, 2025.
             
                                                
                        
            
                        
              Firmware Version:
V1.6.12
ADDED FEATURES:
- Updated Kronos K8 and Optikos3G range firmwares (V1.6.12)
- Added support for EX-1 extension board for external AES audio I/O, RS422 and LTC I/O (Kronos K8/Optikos3G range)
- Added full duplex DMA support for KRONOS K8/Optikos3G range
- Added AutoCapture to DirectShow to improve latency I/O
- Added DirectShow audio filter support for more than 2 audio channels
- Added native 4K support to DirectShow
- Updated Sample apps
- Bug fixes, stability and performance improvements
BlueToolBox updates for KRONOS range
- Added dynamic I/O switching for all KRONOS firmwares
- Added a signal routing & distribution amplifier feature
- Added more SFP+ IP module configuration setup functionality
Refer to the Release notes for a full description of new features.
             
            
                        
              Compatible OS
              Windows 10 64-bit, Windows 11 64-bit, Server 2022, Server 2025
             
             
                        
              Supported Hardware
              KRONOS K8, KRONOS Optikos3G, KRONOS Optikos3G CX SDI, KRONOS Optikos3G ST IP, Epoch | 4K Supernova, Epoch | 4K Supernova S+, Epoch | Supernova CG, Epoch | Neutron, Epoch | 4K Neutron
  
                        
            
                         
                             
             
    
            Previous Versions
            
              Previous Bluefish444 Windows Driver Installer Downloads
                                          
                Windows Driver Installer V6.6.0
                December 17, 2024
               
                                                        
                                          
                              Driver Version:
                V6.6.0.20
                  
                               
                            
                Firmware Version:
V1.5.115
ADDED FEATURES:
- Added new firmware types, split into a set of firmwares for K8 and for Optikos3G
- Supported firmware types for both card types are now 0i8o/1i7o/2i6o/3i5o/4i4o/5i3o/6i2o/7i1o/8i0o
- Added support for port routing in BTB
- Port routing default can be changed in BTB/BootOptions (sets up registry keys)
- More resilience in input signal detection, especially when invalid VPID is present
- Bug fixes, stability and performance improvements
Refer to the Release notes for a full description of new features.
               
                                          
                Compatible OS
                Windows 10 64-bit, Windows 11 64-bit, Server 2022, Server 2025
               
               
                            
                Supported Hardware
                KRONOS K8, KRONOS Optikos3G, KRONOS Optikos3G CX SDI, KRONOS Optikos3G ST IP, Epoch | 4K Supernova, Epoch | 4K Supernova S+, Epoch | Supernova CG, Epoch | Neutron, Epoch | 4K Neutron