Be very very careful, you may end up locking up your player and making it totally unplayable. If it is fine now, do not tinker with it. Never fix something that is not broken.
Whenever downloading firmware updates, it is best to download from the country to which the player belongs.
So for example, if it is a Pioneer USA, use the USA site to download firmware updates, if it is a Pioneer UK, use the UK site to download the firmware. The model may be same both in USA and UK, but firmware programming may be different.
CAVEAT EMPTOR!!!!