1. press WIN+R
2. type "regedit.exe"
3. go to "Computer\HKEY_CURRENT_USER\SOFTWARE\WeirdBeard\Tricky Towers"
4. Right Click Tricky Towers Folder on Export (Name the Save File somehow)
5. Save the File to an external Location (USB Stick, Cloud ...)

To recover the Stats on another PC/Windows just double click the File and accept the import.