Ok. I found the cause why I was not getting anything QML related from the tool. My widget is not in the exe file but in a DLL so I had to specify the dll instead.
But the list of files the tool is getting is huge compared with the one I got by doing the process "manually" and includes most of the .qml files. So my doubt is, do we need to deploy all this files with my application? is not enough with the dlls???