How do I completely remove the VM that colima uses on MacOS?

I am trying to "clean up" my VM of all the certs I have in there now, so I can make sure I know which certs at which locations in what cert format actually fixed a `x509: certificate signed by unknown authority` error for docker builds. (Still can't do direct docker pull from registry-1.docker.io, BTW, which is puzzling.)

However, `colima delete` does not seem to delete the vm, and I know this, because I was doing `colima ssh` and checking the `/etc/docker/certs.d` directory and all the certs I have added from the beginning of time remain there even if I forcibly delete them:
1. `colima start`
2. `colima ssh`
3. `find /etc/docker/certs.d` (lists all the certs I added ever)
4. `find /Home/myname/.docker/certs.d` (lists only those certs I have in my home right now-- its a volume mount, I know.)
5. `sudo rm -rf /etc/docker/certs.d/*` (deletes all the certs that are in there)
6. `exit`
7. `colima delete`
8. `colima start`
9. `colima ssh`
10. `find /etc/docker/certs.d` (lists all the files from the beginning of time again)
Even though most of the `*.crt` files in my `~/.docker/certs.d` directory are no longer there.

Where is the secret location of this VM file, so I can delete it and reload the VM from the downloaded ISO file?