I spoofed the USB to the Spider V amp using a Raspberry Pi to make a poor man's FBV3 Clone. It only does on/off commands, no MIDI. Just sharing if it helps anyone:
https://github.com/stric9r/Line6-FBV3-Clone
https://www.youtube.com/watch?v=L1MMBn6eYOU
Does Spider V Remote support shortcut keys to turn effects on/off? Clicking through the interface is cumbersome if you want to play around quickly, same with the amp's physical interface.
I know I could get a FBV but that's pretty costly to just play around during practice sessions.
I didn't get a link either at first, but I went back to the line 6 website to register my amp again (I removed the registration and just re-added it). Then I got a link to the software and the activation codes, etc.