-latest ?

Hi,
Sorry if this is beyond basic, but I cant figure it. I am trying to use -latest..Comes back with "Unknown Switch". I've just copied it from the example - ie get -latest /FULL/*.bak \\mylocalserver\f$\Source\Vision\.
I have the latest software - now out of ideas..?
Thanks,

F

It turns out when i upgraded the software to latest version, I didn't do it for the specific instance I was trying to use. Once I copied in lastest exe/com, the switch is fine!