nuigurumi/basil_mix · License changed and past agreement

Thank you for your brilliant model.
It appears that you have changed the license, but I would like to confirm that the license for model data previously downloaded and used has not changed. This is just a confirmation to be sure, since retroactive revocation of license that agreed the license at the time I started using the data in the past is contrary to the general principle of retroactivity of the agreement.
(In the case of changing license, I guess common practice is releasing a new version to get new agreement clearly. Currently, the only way to identify license seems to be by checking at the timestamp of the model file)