MVVM text files often make use of so-called 'active content'
consisting of scripts and stylesheet data in the file itself or in external
common files. (Such external files used by many text files together are an
essential element of a site with hundreds of documents.) Here, these scripts
and stylesheet data are entirely harmless and do not make any illicit use of
your computer. Not allowing the use of such 'active content' may seriously
impair the presentation of text files. For example, the MVVM and TRINPsite
floating menus will not be shown. It will also disable various options
alert below will not work anymore.