I did update (Version 2.0.0), and that’s when all went south.
Problem 1 cannot be connected to site theme, as you probably know.
2. Fixed somewhat after deleting a backup copy of the calculator. But still a little glitchy.
3. It’s not a bug – just a usability error, albeit a small one.
4. Also got fixed like #2, but still glitchy.
The scary thing is that i can loose all calculation formulas, which took a day to compile. And no reassurance that a backup will work after you fix this.