In the Arduino program: go to Arduino -> Preferences and then select Show vervose output during ->compilation.
When you compiled you arduino program at the end of line there is directory to your .bin file.
In QT open mainwindow.cpp, edit line number 47, because you probably have different directory to udooclient.exe.
Compile, run and browse your directory where .bin file is placed.
Type UDOO's IP and click Upload.