changing the path of installation files will make oe not work. and that because registry entries need oe in default path.
You can change the store path so you will never lose your emails.
Thanks! Just wondering since I moved the entire Outlook Express from the default to D:\Program Files (x86)\Outlook Express and works just fine running from there. I had to go into the desktop icon and change the properties to the new location and find the OE6 icon in the D: folder as well. You "can" change where Windows 10 uses as a default install folder. It's in a Windows 10 setting. I have also went into the registry and changed the registry entry of where the install root is, and changed it from C:\Program Files (x86)\Outlook Express to D:\Program Files (x86)\Outlook Express but if I go to re-install OE6 2.2.1 the place where there is an option to change to "install folder" is grayed out and you can't change from "your" programs designated C: drive letter. If that were changed to allow OE6 to be changed to a different folder one wonders of that would then work.
There is not as simple as it looks. OE uses many system files and system registry keys. That happens because actually oe was a part of operating system back on XP.
So this will not help to avoid deletion after win 10 major upgrades. Changing the executable path will not make it work correctly or most likely will not work at all.