Hi …,
Welcome.
I suggest you start afresh.
Please disable any Antivirus and Firewall.
In Simlink Plugin Settings uninstall Simlink plugin from your FS, then completely uninstall Simlink using Windows Programs and Features exactly as under .
If they exist delete directories
c:\Users\username\AppData\Roaming\Navigraph\Simlink and c:\Program Files\Navigraph\Simlink
Then download and install Simlink .
Please restart computer.
If still an issue please upload latest dlog from c:\Users\username\AppData\Roaming\Navigraph\Simlink\logs
Cheers
Ian