In OpenMistOS, upgrades to OpenDCRE may be carried out by updating the OpenDCRE docker container. To do this, first stop OpenDCRE.
Then, log in to Docker Hub (assumes OpenMistOS has Internet access):
$ docker login
(enter your Docker Hub username, password and email address)
$ docker pull vaporio/opendcre
If an update is available, the latest version of opendcre will be pulled down to OpenMistOS.
Finally, start OpenDCRE again.
To update OpenMistOS:
$ sudo apt-get update && sudo apt-get upgrade