I am had the exact problem with SanDiskSecureAccessV3_win.exe and Windows 10. Upon installation and creation of a password, a folder named SanDiskSecureAccess Settings and a file named SanDiskSecureAccess Vault were created. The Vault window opened automatically to receive files. I then added some files then closed vaule window.
The problem was that I kept trying to open the file named SanDiskSecureAccess Vault instead of opening SanDiskSecureAccessV3_win.exe.
That needs to be made more clear in the Guide.
