Nvidia drivers for Lightworks video editor

Hello,

I have installed Lightworks video editor but when I try to open it, it opens only for less than a second. I found this on the Lightworks website:

When I go to Software and Updates > Additional Drivers, I get the following:

There are no Nvidia drivers to select. How do I install the needed Nvidia binary drivers to run Lightworks?
I have found these instructions in the Lightworks forum:

I found this ppa for the Nvidia graphic drivers, for the Ubuntu, Mint users
https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update

Since I am not a tech savvy person I do not want to run this command without asking first. Do you think this may help?

Thank you in advance.