UPDATE USB Bootstick

Hi,
I would like to update to the last 8 version professionnal edition portable first.
How can I do this?
After I think to buy 9 version professionnal edition portable.
Must I use Boot-Setup exe or an other method ?
Best Regards
SP
I would like to update to the last 8 version professionnal edition portable first.
How can I do this?
After I think to buy 9 version professionnal edition portable.
Must I use Boot-Setup exe or an other method ?
Best Regards
SP