how to restore VC8 cobol editor properties and colors

I have a Win10, with VC8 and VS2019 prof, and since the last update of VS2019, I have the problem that when editing any program of any solution, I have the problem that the editor does not appear as before, without differentiating colors.
How can I restore it?

Try the steps in the article here.

I did as indicated in the article,
and everything remains the same, no color differences when editing.

\\Program Files (x86)\\Micro Focus\\Visual COBOL\\vsix\\VS16.0>mfvsixinstall

Try Repairing Visual COBOL in Control Panel