After creating a Qml project where you imported a QML file, subsequent projects import this too even though you selected "generate a main.qml file"

To reproduce:

• Create some QML file somewhere on disk
• Create a new Qt Quick Application, when it comes to the "Main QML File" panel, choose "Import an existing .qml file" and select the file you just created

Then

• Close that project
• Create a new Qt Quick Application, when it comes to the "Main QML File" panel, choose "Generate a main.qml file"

Expected: project is created with a generic main.qml (the hello world)
Actual: project is created with the previous .qml file imported

If you close and restart Qt Creator in between these steps, the imported file is forgotten and generating a main.qml file works.