AutoBackups: Open file backup, doesn't work

When I go to the `Command Palette` and choose `AutoBackups: Open file backup` it shows an alert box saying "Backups for this file not exists!" but if I go to the backup directory I can see multiple backups of the same file stored.

This are my configurations:

```
{
// Don't make changes to this file directly as they can get wiped out when the
// plugin is updated. Instead transfer what you need to the 'Settings - User' file.

// The directory where we'll keep our backups. If empty, we'll try to put them in
// D:/Sublime Text Backups
"backup_dir": "/Users/OC/sublime_backups/",

// If true, also save a backup copy any time a file is opened (if backup file not exists)
"backup_on_open_file": false,

// If true, backups saved per day, in separate folders, for example D:/Sublime Text Backups/2013-05-23/myfile.php
"backup_per_day": true,

// If set, backups saved per second. possible values: false, "folder" or "file"
// false - disabled backup per second
// "folder" - backup example D:/Sublime Text Backups/2013-05-23/095034/myfile.php
// "file" - backup example D:/Sublime Text Backups/2013-05-23/myfile_095034.php
// to use this feature, you must have enabled backup_per_day setting
"backup_per_time": "folder",

// Files larger than this many bytes won't be backed up.
"max_backup_file_size_bytes": 262144, // = 256 KB

// Files older than X days will be deleted. If 0 - auto delete disabled
"delete_old_backups": 20, // days to delete

// If true, backup file opened in same line as cursor in original file
"open_in_same_line": true,

// If true, show backup previews
"show_previews": true
}
```