Download of Multibit Windows 64 Bit has corrupt signature I'm trying to download Multibit from https://multibit.org/community.html the Win 64 version.

it consistently gives a 'The signature of multibit-0.5.18-windows-setup.exe is corrupt of invalid.'

is anyone else experiencing this?  Any Suggestions?
There are various signatures tha you can use to ensure the integrity of your MultiBit downloads.

The 0.5.18 release notes have SHA256 hashes of the binaries:
https://multibit.org/releases/multibit-0.5.18/release.txt

You can check the SHA256 hash of the file you have and it should match.
If it does NOT match then DO NOT USE it. 

Try downloading it again from https://multibit.org. It could be that it the download failed.