How to update component in Qt 5.2.1+?

Question

I see this message:

at least one valid and enable repository required for this action to succeed

whenever I try to update comp

Answer 1

Ok, I fixed the problem by simply manually adding the Qt online repository in Qt Maintenance Tool's "Settings"...

Qt repositories are at: http://download.qt-project.org/online and I personally added http://download.qt-project.org/online/qt5/linux/x86/online_repository/ (since I am working on a Linux box 32-bit).