I've used Trackspacer successfully in FL Studio before, but now it doesn't work. I've set up the sidechain, but Trackspacer is listening to its own track. (If I crank the ratio knob up it EQ's away all the sound.)
The only thing I know of that's different is that I upgraded FL Studio to 10.0.9 since I bought Trackspacer. I think I had some 9.x version before.