One hour ago I was making changes to my project and everytime I clicked the hammer "Build ... for project" it was performing incremental build, which was always very quick.
Now, suddenly, while clicking this button the environment always performs a full build which in my case takes around 30 seconds.
Other projects always build only with incremental build. I don't know what has happened.
How to return to the incremental build only setting? What have I done wrong?