Hmm. It's very unlikely that updating presets would cause a persistent stuck key, so I wouldn't worry about that.
A potential solution would be to try working the silicone a bit — push it in towards the center of the key. It's possible (probably unlikely, but possible) that the key is getting snagged somewhere around the edge.
Has it always done this since you got it? Or did it only start doing this recently? If it's always done this, you might just need to break in that key some more. Just step on it and press it a bunch — it's possible the behavior will disappear.
If the stuck key recently developed or if no amount of working/breaking in the key helps, then submit a support ticket (http://www.keithmcmillen.com/support
). We can get you a replacement (our hardware has a 1 year warranty). Point them to this thread if you do end up submitting a ticket.