Importing package into Main conflicts with an existing identifier

Umm, you are using Windows! You probably should find a way to include julia in your path, but that is a different issue, see here.

Anyway, a version you can run from a julia repl:

cmd = `$(Base.julia_cmd()) --startup-file=no --project='C:\Users\aaron\~\code\HV04' -e "import HV04; println(pathof(HV04))"`
run(cmd)

It is calling a julia process from a julia process with the same parameters than before.