Yes I tried that and it says that it is already installed, Package 1:qt -4.6.2-28.el6_5.x86_64 already installed and latest version followed by nothing to do.
Then I also tried running PonderosaClient64 and PonderosaClient only and it still gives me the same error : error while loading libraries: libQtGui.so.4: cannot open shared object file: no such file or directory.