PDF Creator has quit acting as a "printer"

I have been using PDF Creator without problems for years now. On one of the computers (desktop) that I use, a few months ago it stopped to work as the usual virtual printer.

If I print to PDFCreator, nothing happens. However, if I open the PDF Creator program window and drag&drop files there, they can be used, combined and created with the normal print dialogue.

Does anyone have an idea how I can solve this problem?

(Win10, printing from office and photo programs)

I look forward to your answers.