MS Windows
Under Microsoft Windows 95/98 etc, all registry settings relevant to wxhatch are stored in HKEY_CURRENT_USER\Software\WXHATCH This includes all the data for the dialogs, which often remember their past data. To remove all trace of past settings, just delete this key.
Unix
All registry settings are stored in the ~/.wxhatch file
Note
No wxhatch-specific data is stored in any of the cpp or other files which contribute to the project