What specific do you see when launching the simulator?

Multiplayer functionality and regional live-train sessions are entirely disabled on unverified software copies. 3. Database Corruption and Save Loss

The best and safest way to play is through official channels, which frequently offer heavy discounts: Direct from MyTrainz Store:

The most important change is that S20 has moved away from a "one-at-a-time" approach to editing and instead allows manipulation of potentially large groups of objects simultaneously. This workflow significantly increases efficiency and productivity compared to Surveyor Classic.

N3V Games frequently runs seasonal sales on the Trainz Store, where you can buy standalone digital installers or subscribe to Trainz Plus for rolling feature updates [2].