I've just added support for duckdb to the free SQL tool I make:
https://www.timestored.com/qstudio/help/duckdb-sql-editor
It allows click to open, browsing tables etc. If you have some time, I would really appreciate feedback from a real user, other than myself.
:( Thanks for trying. The only thing I can think is perhaps a version conflict (requires 0.70) but I would have expected it to say, rather than freeze. I will try to recreate the problem. Thanks.