Just to make sure - are you able to access hidden folders on your system ? By default, Zero G Registry is a hidden folder and may not show up in explorer/search window for users with limited privileges.
If you have admin rights on your PC, could you update system options to show hidden folders and try searching for the folder/file on your system disk.
A few additional questions:
- Are there any remaining files from the previous installation on you disk (ex: C:/NXP/FreeMASTER 3.2/) ?
- Does FreeMASTER 3.2 shows up in Program and Features under Control Panel ?