It may be convenient to keep executable files in a project, so that you can disassemble them later. As the linker ignores executable files, the IDE portrays them as out of date, even after a successful build. The IDE out-of-date indicator is a check mark in the touch column, at the left side of the project window.
Dragging/dropping the final elf and disassembling it is a useful way to view the absolute code.