I gave up in the end
Can’t you just keep pointing the installer prompt to E: ?
I mean, sure, it would be great if it could remember, but…
Notepad++ has, what, 3 or 4 releases a year, so you’d have to do this fairly rarely, right?
Of course, I’m out of my element, because I use the “portable” version and never have to deal with such a thing. I just unzip the portable into a folder, move that folder where I like, and done.