Changing the directory for 'Backup on Exit' causes CopyQ freeze

[PaduaPlay]

The script at https://github.com/hluk/copyq-commands/blob/master/Scripts/backup-on-exit.ini has -
var backupPath = 'Documents/copyq-backups'

What is the syntax to have the backups done to X:\123\456\Saved\

Tried using 'X:\123\456\Saved' and "X:\123\456\Saved"
In both syntax usages CopyQ seems to freeze, causes continuous blinking of the cursor and when closed no backup is made.

Thank you.

[hluk]

Can you use / instead of \? I think the script might be interpreting \ unexpectedly, thought I'm not sure why it would get stuck.