To be able to play GMS again, you'll need to either disable or uninstall your loopback adapter. Disabling it will allow you to re-enable it whenever you want to play SoulMS, however uninstalling it will not allow you to re-enable it.
1. Click Start
2. Right Click "My Computer"
3. Click Properties
4. Look For Device Manager And Click It.
5. Double Click Network Adapters.
6. Right Click Microsoft Loopback Adapter.
7. Click Disable.
Your Welcome.