Linux Fedora 21, kde 4.14.7, QCAD version 3.9.4. QCAD Pro add-on and QCAD/CAM add-on disabled.

Clicking on 'Save As' or 'Open', even when showing an empty drawing, freezes the program. A dialog shows up, but is completely grayed out. QCAD then stops responding completely (so far for about an hour), and has to be killed.

In the process, a warning shows up in the terminal:
Warning: KGlobal::locale(): Warning your global KLocale is being recreated with a valid main component instead of a fake component, this usually means you tried to call i18n related functions before your main component was created. You should not do that since it most likely will not work

('Open Recent' and 'Save' does seem to work, and can (presently) be used as kind of a workaround, since I'm only working on one file at the moment.)

//        fileDialog.setOption(
//            QFileDialog.DontUseNativeDialog,
//            RS.getWindowManagerId()==="kde"
//        );