Version 0.0.6-rc2 introduced two new parameters that I think perform the expected results you are trying to achieve.
Parameters
&mxcDefaultCatId = (int) Set the default cateogry (id column in manager) of the events to disply
&mxcDefaultCatIdLock = (boolean; default false) Block the category listing when set to true; Also overrides the Manager
Example use with List view:
[!mxcalendar? &mxcType=`list` &mxcAjaxPageId=`48` &mxcFullCalendarPgId=`47` &mxcDefaultCatId=`3` &mxcDefaultCatIdLock=`1`!]
Example use with Calendar view (default) and additional parameters:
[!mxcalendar? &mxcAjaxPageId=`` &mxcFullCalendarPgId=`47` &mxcTplEventListItemWrap=`mxcevent` &mxcTplEventListWrapTitle=`Test-A` &mxcDefaultCatId=`3` &mxcDefaultCatIdLock=`1` &mxcEventListItemClass=`mxModal`!]
also note that there are support threads for each release of mxCalendar that have more members watching so if you post in those you might get a faster response.
cheers