New VM wizard fails to delete directory if going back one step in the wizard.

[Socratis]

Steps to reproduce

1. Menu "Machine" » "New...", "Guided Mode".
2. Enter the VM name, e.g. "Windows 2012".
3. Press "Continue", a directory with the same name is created in the default VM location.
4. Press "Back", because you realize that you actually wanted to be in "Expert" mode.
5. Switch to "Expert Mode".
6. Re-enter the VM name "Windows 2012", because the two wizards are independent, AFAIK.
7. Press "Create".

   Cannot create the machine folder Windows 2012 in the parent folder /Users/Shared/VirtualBox/Machines.

   This folder already exists and possibly belongs to another machine.

Steps to reproduce, part deux

1. Menu "Machine" » "New...", "Guided Mode".
2. Enter the VM name, e.g. "Windows 2012".
3. Press "Continue", a directory with the same name is created in the default VM location.
4. Press "Back", because you realize that you inputted the wrong VM name.
5. Change the VM name to "Windows 2012 (64)".
6. You still have a directory named "Windows 2012" in the default location.

Resolution

When backing up at step 4, make sure that the newly created empty directory is deleted.

Note

I put in 6.0.10 as the version affected, but obviously this goes way, way back...