Hey Nobby,
unfortunately I found a bug (in the USB2.0 version for sure, probably in the other one but i didn't test it).
If you launch the wad manager and u only have an sd card in the wii, it will load the main screen for 1 second, but once the program realizes that there isn't a usb HD plugged into port0 it DSI's (should be easy to replicate these results)
If u launch it via the sd card but u have a usb HD also plugged in it works fine.
I suspect it has something to do with reading the config file from usb, PM me if u want me to test anything before releasing it publicly
cheers buddy
edit: another bug, it errors 100% of the time when using a forwarder channel.... not sure why