Hi “CapCook”,
Please send a screenshot of the Simlink window.
For your post details its looks like Simlink is getting block by antivirus or security application, so please check the Simlink is allow from the security application or not.
For more details, please upload the Simlink log file, which is located at C:\Users\<USERNAME>\AppData\Roaming\Navigraph\Simlink\logs.
TR,
Ahir Vishal D.
Navigraph