Marko - This seems a disproportionately large download compared to its limited feature set. I wonder why the file would be almost 5mb for such a basic screen capture utility?
As a basis for comparison:
Screenpresso - is a 3.4mb download and it has many more features including; capture window or region, capture scrolling windows, built-in editor, add effects, batch resize images.
PicPick - is even smaller at 2.56mb download yet still includes; capture window or region, capture scrolling windows, built-in editor plus some nice tools.
There are another 4 or 5 freeware products with more features than SchirmFoto, including a built-in editor, and all are much smaller download size.