How do I prevent 1Password v7 (Mac) from uploading my vaults to the 1Password server?

Thank you for your response.
 
I have just upgraded from version 6 standalone to a version 7 subscription.
 
Storing the vaults on Dropbox or iCloud appears more secure because an intruder would require the Dropbox or iCloud password in addition to the Master Password. Storing the vaults on the 1Password server would give an intruder full access with only my 1Password account password. I am aware of the Secret Key but that info is stored in the browser until the user clears their browser history. If someone were to gain access to my computer then all they would need is my 1Password account password to gain access to multiple vaults. That is not as secure as storing the vaults in Dropbox or iCloud. I have memorized my long 1Password Master Password and would very much prefer to not have my vaults guarded by a second password on another server.
 
I am aware that I have the option of syncing with Dropbox or iCloud but it appears that the vaults would still be on the 1Password server. The user should have the option of storing their vaults elsewhere, exclusively. I hope that I am incorrect about this, so that is why I have asked: How do I prevent 1Password v7 from uploading my vaults to the 1Password server? Is it possible to select which vaults are or are not uploaded to the 1Password server?