I uninstalled and reinstalled a program on Windows 7 after deleting any references to it in
- The registry (using 'find' command for 'Sneaky' and deleting keys)
- Its original installation folder under C:\Program Files (x86)\Sneaky App
- Its data folder under C:\Users\piper\AppData\Local\Sneaky App
After restarting the computer and reinstalling it still knows about my previous installation.