Hi. Today I downloaded a trial version of RocketSim. I wanted to first try to load an Open Rocket rocket into it and watch the flight simulation. But unfortunately I have a problem with not being able to put any engine in the rocket. When I click on the pipe where I want to put it and click on the load motor, the semi will show a few filters at the top, but there is not a single motor in the motor list. And when I click on prepare for launch, it shows me "no engines data was loaded from disc. Does anyone know what to do with it?