Hi Brink,
I never knew that you could install WLM (I knew it was possible but never checked). It's installed now, works fine, and with it I added the Hotmail account which I couldn't set up with WM because it doesn't support Hotmail.
WLM can separate messages into accounts, too: one set of folders (inbox, etc) for each account.
Installation was fast, too, and it even included transfer of all emails from WM to WLM. But there were problems reported in the transfer.
I found a bunch of x64 apps at start64.com. Later, I was looking for an app that queries an app on whether it's 32 or 64 bit app, then found out (and forgot about months ago) that 32bit processes are exposed in the Task Manager.