This post has been revised. There is now a reference to a path for downloading a patch for Money Plus Deluxe and for Money Plus US Business. This patch does not seem to apply to Money 2005. I don't know about Money 2006 and Money 2007. A pre-patched file
for the
Money Plus Business version is pointed to in the last paragraph of this post.
There is a bug in mnyob99.dll in Microsoft Money Plus including Sunset. The problem may not show up until an OS update, since it's effect is based on what happens to be in what should be an unrelated place in memory. Symptoms can vary from problems adding a payee to hanging or crashing. This applies both for use with 32-bit and 64-bit Windows.
Ameridan offers an explanation in this page : http://microsoftmoneyoffline.wordpress.com/2012/12/02/windows-8-64-bit-version-compatibility-with-sunset-money/ , and he has made a patched copy of mnyob99.dll for Deluxe available by clicking "here" on that page.
This solution was first brought to the forum's attention by rseiler in http://social.microsoft.com/Forums/is/money/thread/636e154a-9693-48a0-ab38-65627d192f6a on November 22, 2012 pointing to Raymond Chen’s http://blogs.msdn.com/b/oldnewthing/archive/2012/11/13/10367904.aspx writeup for the explanation and fix information. It makes for good reading for those who like to understand the details.
There is patched Money Plus Business mnyob99.dll in mnyob99.dll.fix_USBIZ.zip which is 4,150,597 bytes long
zip file MD5:29378d2bd24ac887972f036bea0163c0
Link: http://s000.tinyupload.com/?file_id=02636637287500396177