Multi qt versions
I first installed Qt version 5.8.0. Now I installed Qt 5.9. When I create a Project using QtCreator 4.3. How can I choose the version of Qt to compile it? 5.8 and 5.9.
In the new-project-wizzard, there is "Kit Selection" just for that.
To add to @Wieland :
the Qt Creator Manual : configuring projects page can give you more insight.