Looking to Add an Item Power to Increase Crit Multiplier and Weapon Damage

[Thunderforge]

I'm trying to add two weapon powers from a third party source into my data files, but I cannot figure out how to adjust these fields in a new Item Power.

Laminated - Gains +1 damage to all its rolls and its critical hit multiplier goes up by one as well. Furthermore, the weapon gains +5 to its normal hardness.

Serrated -Has its critical threat range increased by +1

With these being manufactured traits I also tried creating a Serrated version of the weapon (a scythe) but this would make the weapon's crit multiplier x5 and the Hero Lab CritMult field has a max value of x4.