After a day of trying this is what I did:
Download: https://zadig.akeo.ie/ Wiki: Home · pbatard/libwdi Wiki · GitHub
- once opened connect your RA4M1 to usb
- In the first drop down in Zadig choose “DFU-RT Port”
- You will see a green arrow in the next field choose: “libusbK”
- Choose “Replace Driver”
Restart Arduino and everything should work as expected. If not try again but first tap reset two times, then follow step two above.