We have uploaded the TOOLS for UR28M update to version 1.1.0. The included Yamaha Steinberg USB driver (1.6.1) for Windows offers a better compatibility with AMD based systems. After the firmware update to V1.10, the input signal level of line input 3/4 can be selected between +4 dBu and -10 dBv.
Please find the updates and the new firmware here.