"Save as" freezes application

When I try to SAVE AS a file in XML the pop-up window freezes, you can click Save button but nothing happens. Esc button does not do anything… Force Quit is the only option.

On MacOs 10.15.1

Same here. PP 0.42.1 under OS X 10.15.1. See this (in German). Thanks to @Thomas for pointing this out.

It looks like that JAVA is not yet ready for Catalina, you need to wait till a certified version is available.