Hey guys!
Good news! i found a way to create folders with adb so I don't need BusyBox anymore.
That means for you: You don't need a rooted device anymore. Now the software works with unrooted devices too!
Here the new link:
https://sourceforge.net/projects/calibre-tf201/
To install the same as before; move file to folder you want to install it to and double-click on it. The rest will be made by the program!
I will update the program from now on via sourceforge!
Hope you enjoy it!