7Zip works fine!
I had accidently set IE as my default unzipper. Let me tell you, do NOT ever do that. It’s not pretty. I had to log off to make it stop flashing black and white.
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BTW
I rebooted with a live disc, PCLinuxOS or something. I am online with no problem. I can imagine all you need is an old laptop without a hard drive, just use the live disc and a memory card and you are A-okay.
I tried to login to my nephew’s Hero Up account but it told me you need a Windows or Apple O/S to play. Weird.