Hi : ) !!! - Can I go back to Lion from Yosimite only for one hour ?? !!!

[igmolinav]

Hi,

Is it possible to go back to Lion from Yosimite for one hour ??

I updated to Yosimite, but I lost an application, (Virtual Box).
I can recover this app only if I go back to Lion or perhaps
to any other of the previous OS X versions to Yosimite. This
would enable me to update the version of the Virtual Box.
Once the Virtual Box is updated, I can update Yosimite again.

Thank you, kind regards,

igmolinav : ) !!!