for UFX: use the "older" usb driver for devices like UCX, UCX II
for UFX+: the "newer" MADIface driver like for UFX II / UFX III
My Excel comparison sheet tells you, which product uses what RME driver:
Then look at the product page of a more recent / current product using this driver and follow the download link.
If you look at the legacy product pages, then the download links are not being updated and at the status/version when they became legacy.
Maybe a better idea would be to have one URL per driver/os pointing to the last recent version of driver.
Then RME would only have to change the "symbolic links" and
all download links would be up-to-date for all current and legacy products in one go.
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub13