1) Centrafuse's window could be wrong
2) You are sending "ctrl" and then "f" , on a button press, not CTRL and F at the same time. Currently CTRL and another key at the same time doesnt work. Simple 1 key commands are best.
And to find Centrafuse's Window or class, a program like Spy++ is helpful. Or a quick PM to David would be good.
I dont have Centrafuse or StreetDeck, so I cannot help with that part.
But other than that, everything looks good.
If you try with title of "winamp" (and of course have winamp running" the keypresses should work.
And the only titles that work with 1 liners is "winamp" for Winamp, and then "wmp" and "windows media player" for windows media player.
Otherwise it is "title:class" or if there is a subclass/subwindow it is "title:class:subtitle:subclass". THey dont all have to be equal, but if you only have the title, then you have to put "title:" (notice the colon after it), and it will disregard the class. But if it cannot find the window based off of that title, then it will error out of the command, and just do nothing. Make sense?