Whenever I down a said monster the game crashes with a message:

An error has occurred. Please contact the game author for support, as this is likely to be a scripting error and not a bug in AGS.
(ACI version 3.4.1.15)

in "Tween.asc", line 540
from "Tween.asc", line 587
from "Tween.asc", line 681
from "Tween.asc", line 1037
from "LiquidCombat.asc", line 19971
from "LiquidCombat.asc", line 20199
(and more...)

Error: Error running function 'repeatedly_execute':
Error: Array index out of bounds (index: -1, bounds: 0..15)

Thanks. Will look into a fix for this and release it in a patch at a later date, once we have a list of other issues that need addressing.