note about where to run demo.py from

Author: Richard Jones

README.txt

@@ -18,6 +18,10 @@ To start anew (a fresh demo instance)::
 
    python demo.py nuke
 
+Run demo.py from the *source* direcotyr; don't try to run demo.py from
+the *installed* directory, it will *break*.
+
+
 Installation
 ============
 For installation instructions, please see installation.txt in the "doc"

doc/installation.txt

@@ -99,7 +99,8 @@ For The Really Impatient
 ========================
 
 If you just want to give Roundup a whirl Right Now, then simply run
-``python demo.py``. If you used the Windows installer, you should run the
+``python demo.py`` in the *source* directory (not the *installed*
+directory). If you used the Windows installer, you should run the
 ``roundup-demo`` program instead. Users of other binary distributions or
 pre-installed Roundup will need to download the source to use it.