Note: 'Avira' and 'Avast' antivirus packages may give a false positive. All updates for TOPER 737NG Tool will be available for download from here: All updates package: TOPER 737 v1.3.5 Update (08/05/2017): INTERNET CONNECTION NEEDED FOR ACTIVATION. EACH SERIAL CAN BE USED ON 5 DIFFERENT MACHINES Please make sure your system is not blocking the activation utility from having unrestricted internet access. Effective changes in new release: improved performance calc