FYI for future reference, according to RnD and Support, the registry key has to be added in two places. Here is the correct information to disable Snapshot Hunter in v9
Create the following in both of the following locations:
HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Backup and Replication
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Veeam\Veeam Backup and Replication
Thanks and good luck!