Question

Using Visual Studio setup project. I’d like to change Everyone / Just Me choice to the same as the user selected during previous installation.

Answer 1

Finally figured it out. Used a VBScript Custom Action.

Dim myUpgradeCode
myUpgradeCode = "{6EFB1553-7F4F-4E26-A32B-E2F0F8E11CA9}"

Dim justMe
justMe = False

'AssignmentType 
'   Equals 0 if product is advertised or installed per-user. 
'   Equals 1 if product is advertised or installed per-machine for all users.

Set products = Session.Installer.RelatedProducts( myUpgradeCode )
For Each product In products
    astp = CLng(Session.Installer.ProductInfo(product, "AssignmentType"))
    If astp = 0 Then
        justMe = True
    End If
Next

If JustMe Then
    Session.Property("ALLUSERS") = ""
Else
    Session.Property("ALLUSERS") = "1"
End If

And executed it before AppSearch.

Done!