Check the Grass Valley Support Portal (the successor to Canopus) for archived ACEDVio or "Small Cyclone" drivers.
If you are on Windows 10 or 11, you may need to switch your FireWire controller driver to the "1394 OHCI Compliant Host Controller (Legacy)" version for the Canopus hardware to be recognized. Troubleshooting Common Issues canopus u13pc211 driver