... anyone know why this patch causes WLM to crash after a few seconds?
Yes - because:
... using this program ... on windows 10 32 bit,
The patch is only supported on Windows 7, 8 and 8.1:
Run the program in Windows 8 compatibility mode to prevent the crash:
1. Install the patch when no programs are running. The program may open and crash - if it doesn't, close it down and wait a few minutes.
2. Reboot the computer.
3. Open File Explorer (Windows key + E) and navigate to
C:\Program Files\Windows Live\Mail
and open the folder. 4. Right-click on wlmail.exe and select Properties. On the Compatibility tab, select Run this program in compatibility mode for > Windows 8. 5. Click Apply and OK , then launch Windows Live Mail and test.