You're welcome! Installing LIBUSBK driver for DBI can be a bit finicky and I know I had some trouble with it due to steps not being explained in detail, but if I remember correctly, you need to:
- Connect the Switch to the PC.
- Run dbibackend.exe, select one of your games/updates/DLC files (just to test the connection between Switch and PC) and start the server.
- Run DBI on Switch and select "Install title from DBI backend". If it works, it works! But it probably won't, so proceed with the next step.
- Run Zadig.
- Hopefully, DBI will be listed in the dropdown menu (make sure that your start the server in dbibackend).
- If it's there, click on the install driver button (LIBUSBK driver should be selected).
- After that, you'll probably need to restart the server in dbibackend.exe and restart your DBI app on Switch. Hopefully, it should work now.
In case you can't make it work, I'll check once on PC and give you the correct steps. Good luck!