Do you mean that before updating the NoMachine software on your client you could see the other computers on your LAN, and now you can’t? In theory, updating the client side shouldn’t affect autodetect of NoMachine servers running in the same LAN.
Have you accidentally changed something in the Player privacy settings? See this: https://www.nomachine.com/DT11M00106#2.5. If the ‘Don’t show other computers on the network’ is checked, you won’t see any available machines. Similarly, if other machines where NoMachine is installed have not checked ‘Advertize on the network’ box (https://www.nomachine.com/DT11M00106#3.1.), you won’t see them when you are on the LAN.
If you are not on your company’s LAN, your Player won’t be able to find the machines that are available. Is it possible that you have moved off the company’s network?