To update the AV run the following:

$ docker run --name=bitdefender malice/bitdefender update

Then to use the updated bitdefender container:

$ docker commit bitdefender malice/bitdefender:updated
$ docker rm bitdefender # clean up updated container
$ docker run --rm malice/bitdefender:updated EICAR

To get a 🆕 license key

Get from https://www.bitdefender.com/site/Products/ScannerLicense/

NOTE: Download the new version here