[Freesurfer] Version 6 Beta on Virtual Box problem

Hello everyone!

I am currently using Virtual Box to run Freesurfer and I was wondering if my plan to put the version 6 beta on to my current virtual box was a valid one.

My plan was to delete the Freesurfer folder off of the 5.3 virtual box and replace it with the Freesurfer version 6 folder. However, the virtual box is not letting me delete the Freesurfer folder. So I have some questions:

1. Does anyone have an idea of how I would go about deleting the original Freesurfer folder, so I could continue with this plan?

2. Is this plan a good one?

3. Should I try and download another linux virtual box somewhere and put the version 6 beta on that?