Yes, connect to network (probably wifi) then start PND manager and press Start to make it sync your list of PNDs. It'll then offer to upgrade them for you if you press Y (you may need to be on the leftmost tab to do this, I forget).
99% of PNDs will update fine. For one or two you might need to delete their appdata folder to reset their settings, if you've not updated for a very long time, but it's very rare for that to be needed.