Editor freezes after opening a PDF.

I have installed PDF24 V3.5.3 on XP SP3. It works fine for creating a PDF from other programs, but the editor doesnt work. When I open a PDF in the editor, it is initially displayed in the window, but as soon as I click anywhere, the program freezes.
I suppose I can uninstall and reinstall but maybe somebody has a more elegant solution.

Stefan Ziegler Changed status to publish 2018-06-14