[daplunk]

To make a monster appear in the Encounter Builder is a two part process.

1st. Create the monster in the Editor. Save it etc.
2nd. Create a portfolio that contains that monster. Add your weapons and armour to it. Add a picture if you like. But save the portfolio as a *.stock file and put it in your Data/5e folder. This will allow you to pick it from the Encounter Builder and it will include any weapons you selected.