I don’t think i explained it very well, the Button for going up or down the Timespinner have the same Class as the Buttons for changing months. In your Code you have this

        
/*
dont show previous month selector if
- min year available is > current selected
- current selected year/month is the same as min year/month
*/
var showPrevMonth = (ts_min['Y'] > ts_now['Y']) || (ts_min['Y'] == ts_now['Y'] && ts_min['n'] == ts_now['n']) ? false : true;
if(!showPrevMonth){
$('.'+pluginElmClassName+' .xdsoft_prev').hide();
}else{
$('.'+pluginElmClassName+' .xdsoft_prev').show();
}
/*
dont show next month selector if
- max year available is < current selected
- current selected year/month is the same as max year/month
*/
var showNextMonth = (ts_max['Y'] < ts_now['Y']) || (ts_max['Y'] == ts_now['Y'] && ts_max['n'] == ts_now['n']) ? false : true;
if(!showNextMonth){
$('.'+pluginElmClassName+' .xdsoft_next').hide();
}else{
$('.'+pluginElmClassName+' .xdsoft_next').show();
}

the thing here now is, one of the Buttons for the Timespinner automatically disappear too if one button for changing the Month disappears. Thats because of the same Class they share. I don’t really know if this is intended or not, that the buttons for the Time disappear too.