Gary has written up a how-to on upgrading, which is here:
https://multibit.org/en/help/v0.5/help_upgrading.html
@lunarboy
Yes - that would be nice !
At the moment it is bitcoind which is the 'gatekeeper' for the transaction fees (it will become more flexible in the future).
The MultiBit fees are as low as you can go currently so I cannot reduce it safely at the moment.
I think the recent run up of the price of bitcoin has surprised everyone but I am sure it will get sorted.
Thanks for the quick response keep up the fantastic work.
As your online I'll pop in another feature request. would really love to see copy/paste functionality added to the sign message tab (manually typing out addresses and sigs is an accident waiting to happen) I'm too careless :-(