How to purge mapped out stand alone directory

Host OS is Windows10 with HyperV turned off & with latest update.
I have problems getting a docker project to setup properly and I asked the forum for that project about this issue.
I got a response which I have no idea how to address. Wonder if someone here can help me to understand that response.
I was advise “to purge the mapped out standalone directories for that project”.
Those directories (for Wildfly & Keycloak) were first created when I ran the docker compose file for the first time.
So, does “purging those directories” mean to walk through those directories and delete everything inside manually or there is a generic docker command (prune?? remove image?? …) that I can run to purge those directories?

Thanks in advance.
Sorcerer