There might come a time where you would prefer to use another program for a resource that your computer already has a program for. For example, you might wish to choose LibreOffice instead of Senitrus Office. There is nothing wrong with that, but the process is designed in a way that assures that the program doesn’t assume you would want to make them default. In other words, you must decide which files are the default from from a drop down menu of all applications that can support that role. For example, you would not see “Browser” in the Word Processor, but you will see the Web App version of Google Docs as an option.
By default, Senitrus applications are the default program for the service or resource you wish to you. If you decide in the future that you wish to make another choice, Thant you would just come back to this section, and make the appropriate change. You can make changes by going to Settings > Programs > Defaults.