Managed to fix this today as my client was giving errors also.
Install Beta version from here: http://dl.covecube.com/CloudDriveWindows/beta/download/ (I used 1344)
Don't start CloudDrive and/or service.
Add the below to this file: C:\ProgramData\StableBit CloudDrive\Service\Settings.json
Start Service & CloudDrive. Should kick in straight away. I have 42TB in GDrive and it went through immediately. Back to uploading as usual now.
Hope this hel