trestle add error

[dwbenjamin]

Following the instructions on the compliance-trestle-demos, in the section Inserting parameters, executing the command
trestle add -f ./profile.json -e 'profile.modify'
results in this error
trestle: error: argument cmd: invalid choice: 'add' (choose from 'assemble', 'author', 'create', 'describe', 'href', 'import', 'init', 'merge', 'partial-object-validate', 'remove', 'replicate', 'split', 'task', 'validate', 'version')