This site is being deprecated.
Please see the official X‑Plane Support page for help.
You may try these steps: click Start, click All Programs, goto Accessories, select Command Prompt, right click on the Command prompt Run as Administrator, Type "ipconfig /flushdns", Hit Enter.
Check if it helps.
You can also try typing:ipconfig /releaseipconfig /renewnet stop dnscachenet start dnscachenetsh int ip reset resetlog.txtnetsh winsock reset catalog
You can read more here.
This site is no longer being actively maintained.