This is quite a simple timestamp recording widget. It has just this three functions:
1) on a single click on the widget a timestamp is recorded
2) on a double click on the widget a list with all recorded timestamps is shown
3) a timestamp is copied to the clipboard on a long click on the list

That's all there is nothing more. There is no way to add a comment or something else to a timestamp. And there is no (easy) way to delete the recorded timestamps.

P.S.: If you don't like the widget color just replace it with a new widget. The widget changes its color at every time you add a new one.