When I try to install Apache OpenOffice via the Portable Apps Menu, the dowbload fails due to a 404 error. However, the correspondig link at the Portable Apps website (App -> Office -> Apace OpenOffice Portable) works flawlessly. I think the Portable Apps platform app needs to be updated.
There was an issue with new installs and updates from earlier than 4.1.1 of the standard language version. Please try it again now.
Sometimes, the impossible can become possible, if you're awesome!