S7-PLCSIM 1500 problem with connection

Hi, I have a problem trying to connect to s7-plcsim 1500 I am using the template from the creators website and it doesn’t do anything I can only connect to S7-300 with 1200/1500 I don’t want to because it pops up a message that more than one instance is enabled I don’t know what to do anymore.

Thanks for Help