Hi!
Just wanted to give the author a heads up that on the latest WordPress version (4.5.1 when writing this) the plugin slows down the entire backend even when not backing up.
What usually just takes a fem milliseconds (navigation) takes up to 5-10 seconds.
I've disabled this application, only enabling it when I need to make a backup, which is kinda frustrating but I'll survive for now :)
Best Regards