(Note, we found out some forging issues with the Docker version, hence this functionality, while possible, is not currently supported there. We will start investigating native Windows wallet shortly to avoid Docker altogether).
Is there any chance you will have another go at this before the native Windows wallets come out?
Seems I said it incorrectly, the feature is present there and can be used, however if there will be any issues with it we won't support them, as we found the Boot2Docker VM networking quite unreliable (delays in PoT requests, etc...).
To update you just need to follow:
https://github.com/crypti/crypti-docs/blob/master/boot2docker.md#1-update-to-latest-crypti-docker-version