could not find or load the Qt platform plugin "windows" in

[DPrado]

I saw other threads in same situation I have a application in Windows 7, QT 5.5.1, with MSVC2013 and in QT Creator fails with this error. But the situation is different from other threads. In Debuging mode the aplication runs correctlly, but not in release mode.

[Bonnie]

Did you run it from Qt Creator? Is there a qt.conf file in your release folder?

[DPrado]

Yes, I run it from QT Creator, and there are no such file.

[jsulm]

@DPrado How did you install Qt?