Did you also try to add the voidexpanse executable to the rules?
"The simplest solution - please add "VoidExpanse.exe" and "VoidExpanse.Server.exe" to your Firewall exclusion list and the problem should be fixed!
This has been second or third time this happened to someone out of the many purchases so I think it's something related to your PC/Firewall why it didn't get added automatically.
Anyways goodluck and let me know if the above works.