It's possible with the windows desktop program to access vaults-"folders" (windows displays vaults as a folder) not named ending with .agilekeychain or .opvault.
In the windows 10 beta it's not possible yet...
Sometimes I guess it's a bit more secure to hide a keychain in a misleading folder name called "website backup" or so (as keychain files look like a downloaded website), so simply renaming the 1password.agilekeychain folder worked for the desktop version...
But also some other programs can rename the folders. I sync my Vault using dropbox, but I don't want to rely on one closed source encryption, so I additionally use Boxcryptor to even don't let dropbox know the file names if government (or similar) asks for a list of stored files.
Boxcryptor works transparently in the background - every program can access the encrypted files like when they're not encrypted if boxcryptor is running.
The only disadvantage there is that this really slows down the read speed which lets my desktop-1password unlock the keychain for a full minute bevor showing any data... But I prefer security instead of convenience...
1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Windows 10 x64 bit
Sync Type: Boxcryptor