Installed Picard 2.4.2 yesterday. Everything working, was able to catalogue several hundreds MP3s. Then I right clicked in the bottom panel and clicked on "Show changes first", and Picard froze. I had to kill it via Task Manager.

Since then, it's not working anymore: I open it, click on "Add folder" or "Add files", select one or more folders/files. The status bar reads "Adding X files from Y", but nothing happens.

Tried to reinstall, uninstall+reinstall, keeping or discarding user's preferences, cleaning the registry in between, but to no avail.