This seems to work; in 64 bit Windows I've installed:
XnView
WinUtilities
WinRAR
and all of them show under the "Analyzed Programs" tab.
Oddly, WinRAR (64 bit) does not show up under "Installed Programs" tab.
The green progress bars don't always reach the end of their rectangles, but the program seems to work.
However, I haven't uninstalled anything.
Parenthetically, I'd suggest changing the title of this thread from "windows 7 64-bit" to "Windows 64-bit" since the problem seems relevant to all 64 bit versions of Windows.