Please chose right version according your Minecraft version. Visible versions are for new Minecraft Launcher.
(newest) Minecraft Tweaker 1.13.2_18.2-Lite for Minecraft 1.13.2
Minecraft Tweaker 1.12.2_18.0 for Minecraft 1.12.2
Minecraft Tweaker 1.12.1_16.9 for Minecraft 1.12.1
Minecraft Tweaker 1.12_16.8 for Minecraft 1.12
Minecraft Tweaker 1.11.2_16.4 for Minecraft 1.11.2
Minecraft Tweaker 1.11_15.7 for Minecraft 1.11
Minecraft Tweaker 1.10.2_15.3 for Minecraft 1.10.2
Minecraft Tweaker 1.10.0_14.6 for Minecraft 1.10.0
Minecraft Tweaker 1.9.4_14.4 for Minecraft 1.9.4
Minecraft Tweaker 1.9.2_14.2-Lite for Minecraft 1.9.2