I just started using Baltisar Tidy after having used PageSpinner for many years.
When opening the old html files, Balthisar displays a message about false input-encoding and offers to convert to MacOSRoman. Accepting this garbles the document. Apparently Balthisar has guessed wrong. Choosing "Ignore" does not import any text to the document.
A sample html-file and screen shot attached.

nett.html.zip
I use macOS Catalina 10.15.3 (19D76)
Balthisar Tidy version 4.2.0
I just started using Baltisar Tidy after having used PageSpinner for many years.

When opening the old html files, Balthisar displays a message about false input-encoding and offers to convert to MacOSRoman. Accepting this garbles the document. Apparently Balthisar has guessed wrong. Choosing "Ignore" does not import any text to the document.
A sample html-file and screen shot attached.
nett.html.zip
I use macOS Catalina 10.15.3 (19D76)
Balthisar Tidy version 4.2.0