IDE freezes / greys out when NTLM proxy password is incorrect

I have an NTLM proxy with domain authentication configured at work on a Windows 7 desktop. My domain password has expired and I changed it. Upon launching Netbeans 10vc5 (happened with all 10.x versions), the entire IDE hangs then greys out forever. One can not get to Tools -> Options to update the password before the hang. I deleted all content under AppData\Local\NetBeans and AppData\Roaming\NetBeans, which solves the problem, but is not a solution.