I recommend reinstalling jEdit. The install process should find the newer Java.
jEdit 5.7: Bug in "Global Options - Encodings Pane - line separator characte"-Dialog
Fixed in jEdit 5.8pre1
Is the ProjectViewer docked or floating? Regardless, I can't reproduce. How did you invoke the file browser? A menu action or a keyboard shortcut? There is a context menu item called "Show in VFS Browser" when you right-click tree nodes in the ProjectViewer that brings me to the right place.
There is no jEdit 25.02. Please clarify the version#. Also, you might want to clear the activity log, reproduce the issue, and then attach the activity log.
CtagsSideKick has an interesting history. Before, there was CodeBrowser plugin and I asked the author to please turn it into a proper SideKick plugin. So he did, and we called it CTagsSideKick, and you can't download CodeBrowser anymore because it is no longer maintained. I like CtagsSideKick much better because we don't need another dockable to use it. My SideKick dockable has 16 parsers. I use it for showing me a structure browser in any language.
CtagsSideKick has an interesting history. Before, there was CodeBrowser plugin and I asked the author to please turn it into a proper SideKick plugin. So he did, and we called it CTagsSideKick, and you can't download CodeBrowser anymore because it is no longer maintained. I like CtagsSideKick much better because we don't need another dockable to use it.
Why would someone use this instead of CtagsSideKick?