I made the following changes to Power.lua, PaperDoll.lua, and Aura.lua in the \dist\ folder, and so far It is working.

Power.lua changes: edited lines 37 thru 66 to reflect changes to SPELL_POWER_'Type' constants.
UNIT_POWER event name updated to UNIT_POWER_UPDATE

PaperDoll.lua changes: removed all references to multistrike.

Aura.lua changes: line 750 updated to reflect new order/number of variables in UnitAura function.

Updated_Files.zip

Thank you a lot Volgrath, it works for me!

I've updated a few more files, mostly to fix the API change from COMBAT_LOG_EVENT_UNFILTERED to use the new CombatLogGetCurrentEventInfo for the following files. (Came across an error where Enemies() wasn't working properly in the scripts... went down the rabbit hole). Reply if I missed any, or screwed up. I also included previous changes to Aura.lua, PaperDoll.lua, and Power.lua, as well as updated spells.lua files for Demon Hunter and Paladin. (More to follow as I get to them). Again these are the files updated to new combat log API:

Aura.lua
BanditsGuile.lua
DamageTaken.lua
DemonHunterDemonic.lua
Enemies.lua
Health.lua
HonorAmongThieves.lua
Future.lua
ShadowWordDeath.lua
SpellDamage.lua
WarriorCharge.lua
WildImps.lua

Updated_Files.zip