I've been informed that currently upgrading Money 2005 from its 'out of the box' version to the patched version (from version 14.0.x.0730 to version 14.0.x.1105) is currently experiencing problems, and so these upgrades don't currently work.
Microsoft is working on the problem. In the meantime you'll probably not be able to open your Money file if you've just done a clean install and need to use an existing file.
As far as I know, it is affecting all regions.
Update: 14 May - I'm hearing that the fix should be ready later in the week, however this is not guaranteed.
16 May: Hearing this morning that things seem to be working again