After i got an upgrade for qtcreator the Help diappeared. I tried to add the help manually by going to tools->options->help->documentation-<add...
pointing to /usr/share/qt4/doc/qch/qt.qch gave the error:
Unable to register documentation.
Invalid documentation file:
/usr/share/qt4/doc/qch/qt.qch

The help file should be valid since it from the ubuntu universe package qt4-doc-html

What can I do to get the Help work again?