It should have been resolved by now but
Start > Run > c:/windows/system32/drivers/etc
Open "hosts" in notepad. Below the last line, enter the following two lines:
File > Save > select "all files" > save over "hosts"
Re-open internet browser > go to WAB > Ctrl + F5
If people type in the actual IP address, they'll access the default WAB homepage on the new server but be unable to use its features (such as logging in).