Font problems with version

I updated today for
Using Windows7 64 bits.
I found destructed all math formulas written with the previous version (Equation editor in Writer document).
Equation Editor doesn’t work correctly neither writing new equations.
What could/shell I do? .

May I ask you to please have a look at: What information should I include in a question in addition to OS and LibreOffice version? - #4 by ROSt53 especially which steps did you take to open and verify the faulty files. Make sure you have back-up files.

The problem does not regard faulty (old) files. Wrong fonts in Math equations (itself and in Writer) appear as well in old and in new documents. I’m using English installation and did nothing besides update.

I don’t know what was the problem, but after uninstalling and reinstalling LO all turned to work correctly.