You should definitely go for the installer option.
But a 64 bit program would end up in "Program Files" and not in "Program Files (x86)".

In other CAD programs every graphical object has a layer property. This is not the case in FreeCAD where a layer is really a group. How do you deal with this fundamental difference?

If you create a file with only the sketch you can use Std MergeProject to import it.

That indeed makes sense. Thanks for your explanation.

Maybe if the user selects both the wall and its base an independent copy should be created?

It is interesting to compare the behavior when copying an extruded rectangle.

Position: 15:30.

A coincident constraint (Sketcher ConstrainCoincident) is applied ("I put these two points on the origin"). In the tutorial the keyboard shortcut "C" is probably used.

Having two walls share the same base seems undesirable to me. But even if that is the default, there should also be a way to create an independent copy of a wall with its own base.

Another issue that is perhaps related:
Problem copying walls

Apparently the bug has a different cause:
https://forum.freecadweb.org/viewtopic.php?f=23&t=40400

Only the current view:
Have you checked additional "Secondary projections"?

Rotate the view doesn't work:
Use Std Refresh to see the updated view.

The scale cannot be changed:
You first have to change the Scale option to "Custom".

MaxP may be a spammer (off-topic link in signature).