You could try looking in the registry on your old computer and export any settings relating to Nitro Pro 8, then importing them on the new computer. Open regedit.exe then press F3 to open the search box, then search for Nitro, or just look in "HKEY_CURRENT_USER\Software" or "HKEY_LOCAL_MACHINE\Software" for a folder called Nitro (or similar) and export that folder to a .reg file and import on the new computer.