no distance to other widgets

Hallo,
I love your plugin, but I’ve a problem with the distance to following widgets. You ca see the problem here: verbanddg.lerntherapie-probstei.de
It is always the same, whatever the following widget is, whatever the used theme is.
I think, there is a numerary to change, but I can’t find, where it is.
Please help.

Greetings
Sisam

https://wordpress.org/plugins/memphis-sliding-menu/