I have to also say that fireworks launcher also won't work. It will appear as an addon to enable/disable but will not appear during the game as a usable item. Also, if this is an updated version, then why does it still say Version 1 in RTB.
Technically, it is version 1, i haven't had any bugs to fix
Also, i've tested my add-ons, they should work, they've worked for some other people i'm sure, i still have them, and they work :/
Edit: Hm, that's right, it changed the Rocket Launcher particles, eh, i haven't felt like updating it, i'll have to see about how to get the description.txt working for RTB as well :/