As ZP says dont let this put you off, at least you can man up and admit you made a mistake. Just be careful what you release around here, many folks are creating commercial games and trust the media creators to not get them into any trouble.
Golden rule, if you didnt make it, dont release it here.
You can use filter forge textures for commercial use provided you own the software and output it yourself, thing is really doesnt take much to change a filter thus making it your own, the texture you used was simply downloaded from the site which is covered by FF website license.
Quote: "It's a great program, but it anin't too flexible."
Its actually very flexible if you use the flter modules to create or tweak your own.
Quote: "Hey Rolfy, a fellow Filter Forge user! That's been my secret weapon the last few years, I've been using since the release of version 1, and Filter Forge 2 is even better"
Its actually the wife that purchased it, she's really good with it too, I have been tryng to get her to create a few packs of textures for FPSC her stuff is excellent and she is a real pro with Photoshop. Sometimes she really blows me away with her skills

She hasn't upgraded to V2 yet but reckon she will soon enough. How are you liking V2?
Thing is FF makes fantastic base textures and with a little more work they can be outstanding, I wouldn't recommend just using the basic output of most of 'em as they are kinda dull straight out of the box.