Unfortunately, no. It is not possible to migrate projects from one account to another. If you wish to use only the platform of the Chambre des notaires and close your regular subscription, it is then recommended to download all of your current projects (documents and audit logs) and save them locally on your workstation, your case management software or your archives.
It is also possible to cancel current projects. You will then have to create them and launch them again on the new instance.
It is also possible to export your address book from your checking account and re-import it back into the new instance. Use the Export CSV / Import CSV function from your address book.