Anaconda not available in PyCharm

I have just installed Anaconda 3.6 and PyCharm. I am trying to set up the interpreter, however if I navigate to the interpreter window I can see the error message saying "Conda executable not found" as well as "Environment location directory is not empty".

Please see the screenshot below. Do you have any suggestion what I could do? I deleted Anaconda and Pycharm already and re-installed them again without success. I must also say that my untitled folder under Location is already empty.