title: Move Pycharm project to another directory
body: <p>My home dir ran out of space and I wanted to move the PyCharm project to another directory. I ended up copying it because refactoring didn't work.  I deleted the pycache and the zip exception, that had appeared was gone and now everything works as expected. I still use the venv location of my initial project location though, from what I can see in settings/python-interpreter.</p>
  <p>Is there anything wrong with this procedure, anything I'm not aware of?
  Should I edit some of the files in the .idea folder?</p>
  <p>The <code>$PROJECT_DIR$</code> variable caught my attention, but I couldn't find where this variable is actually set.</p>