The "Filters" container on the top right displays the filters that have been defined for the file type that is currently selected on the left.

Note that the &xwp; file filters are not related to the default WPS file filters, which have no meaning here and cannot be modified using this page. If extended file types are enabled, &xwp; will completely ignore the standard WPS file filters.

While the WPS file filters were used to assign a program to a data file, &xwp; uses file filters to assign a file type to a data file. For example, if you define "*.htm" as a filter for the "HTML" file type, all your files ending in "*.htm" will automatically get the HTML file type (and the associations defined for that type).

&xwp; allows you to import the WPS filters though to make them work with the extended file associations. Right-click into the "Filters" container and select "Import WPS filters".