Hi,
I'm glad to have found this thread because I am having the same problem. I recently upgraded my PC from Windows 8.1 by doing a clean install of Windows 10. I use Dropbox rather than Google Drive, but I am getting the same "Incorrect Password" notification when I try to connect the Windows 10 PC to my vault file in Dropbox. My only other connected device is my Android phone, and Enpass works fine on it.
Pardon my ignorance Abhishek, but I don't know how to "remove the synchronization from all the connected devices." Would you please enlighten me?
Secure, have you been able to connect to your "new" Windows 10 PC to your Enpass vault?