Before installation follow some steps:

*Disable Internet
*Turn off gatekeeper by allowing app
* Add following command in terminal
  sudo spctl --master-disable
* Install app
Tuxera NTFS 2020.1 Product Key
 3VV2VF-HQZ01U-MZ5ZU9-ZVEH45-H6CFE4
* after installation block internet connection in firewall