The "Executable:" file path setting should be expanded to i.e. "C:\pathToExec\Target.exe". In the current version 2.7.0 it's expanded to "C:\pathToExec\Target", without ".exe". What makes trouble when the linux binary is in the same folder and the linux binary is of course without ".exe". So I cannot start the windows binary without a manual change. In Qt Creator version 2.6.1 it works as expect.