Set the worker_template_path for the Worker to point to the directory containing the Job Types. Note, that on Windows, you must use UNC and the path separator is a forward slash "/".
worker_template_path = "//qubesupervisor.as.com/jobtypes"
qbconfigfile qbwrk.conf
Every change to the qbwrk.conf only requires a reconfiguration:
qbadmin worker --reconfig
while a change to the qb.conf requires a restart of the Worker.
qbadmin worker --config host