Problems when deleting and re-creating a project

Hi,

 > I've got the following problems:
 > I've a sample project, where the build files seem to be corrupted. To
 > fix this, I've renamed the folder and tried to create an empty project
 > with the old name; an exception is thrown.
 >
 > ...

I've found out, that it is caused by the project's name remaining in the 
project files.

Thus, there should exist a 'rename' for projects. And, as the project's 
name may differ from the folder's name, there should probably be a 
special project open dialog, showing the project's name behind its 
folder name, making things more transparent.

No exception should be thrown; instead, a 'normal' message box should 
appear 'The is already a project named abc at location xyz'.

Kind regards

Peter