Replacement Box

Hello all,

I am looking for some advice as to what to expect when I upgrade my existing hardware to the new box.

Existing has been in place for about a yr and half, hardware was older when installed. We have settled in and found Untangle to work for our needs so being preemptive I have built a new box and am doing burn in now.I will keep old one for redundancy, just a straight swap.

Should I install the newest version of Untangle?
Will the backed up settings migrate directly?
Will my VPN users need to install new updated clients?

Any and all advice would be appreciated.

Thanks
Rob