[drinfernoo]

In asking that adds its own "See More" item, you'll need to disable that item. You also need to raise the widget limit high enough to show the "Next Page" item that is added by the add-on, which in most cases means the widget needs to show at least 25 items.

I have added TMDB helper most popular list as a widget under its own group and put it on the home page, where can i disable it's "See more" function? Is it done the same way as editing the label of said widget. Or is this in the settings of TMDB?

"See More" is something you need to disable in the skin, or by raising the widget item limit past the number of items in the list, as I already explained.