I have tried this with and without the quotes. I think quotes would be needed around the file names because of the spaces, e.g. Program Files; GMail Backup.

"C:\Program Files\GmailBackup\gmail-backup.exe" backup "G:\Backups\GMail\GMail Backup\" "bernieamler@gmail.com" "1L3n5x7R5l2s9"

However I get the error:

Script GMailBackupScript: Option 'password' is not specified

What am I doing wrong?

Email : BernieAmler@GMail.com