This is a static information website. It has no accounts or forms and sets no cookies of its own; the only thing it remembers is your light or dark preference in your own browser.
Fonts are loaded from Google Fonts, which receives your IP address when your browser requests them. Purchases, licences and support are handled on the Megasoft marketplace at mhmcloud.com under its own terms, and the live demo runs on msms.mhmcloud.com with sample data only.
The MSMS software itself stores each school's data in that school's own WordPress database; Megasoft does not receive it.