Since this is my first issue, I would like to thank you for the great work on this project!

In my setting, it is not possible to open existing map files. In the "Open" dialog of the map editor, the "Files of Type" text box shows "filter.fsm" (it probably should show "*.fsm"). Since it cannot be changed, it is impossible to select one of the map files that exist in this folder (see image). Note that it is also not possible to paste a text in the "File Name" box.

FreeCol Version: git-20220217 (on MacOS with Java 17)