@pvanek Sorry to bother with this, but this is a desirable app, including for systems without Qt5. Could you say what may be going wrong here? I tried to build 2.0.2 release, as well as the last 4c79aeb commit prior to a switch to Qt5. Both built with zero issues, both launch and show up in the system panel at the top of the screen. They also can capture clipboard contents, which I can see from a dropdown menu.
However, nothing else works. Clicking on about or configure qlipper does nothing, no window opens. I cannot paste the text also, clicking on the copied text in dropdown menu has no effect.
No patches are applied from my side, both builds are as-is.