I worked on a Joint Venture project involving WS Try (a forerunner to the current company) back in 1983 ... to build a zoo in Riyadh, Saudi Arabia. One of my more 'unusual' jobs!
Use the Brave browser instead, it has a pop-up blocker built in. It keeps RMWeb 'in check' nicely. Been using it for a few years now and no other side-effects. Available at Brave.com (as you'd expect).