So, I was attempting to reset my progress, but it looks like this doesn't actually work. It kicks me back to the first system and removes my local autosaves (so nothing is built on the planets when I go to them), but all planetary shields are unlocked and I can still travel to any system.
This is fixed in the upcoming build... which should go up later today or tomorrow.
Sweet, fixed the music mute bug too, I see. Thanks!