Uuugh. Well, I tried the third patch option: I downloaded it, unzipped it, dragged & dropped the files and the Modules folder in the HM2 directory replacing the files there. And then I got this error message which prevented HM from booting up at all:
So then I tried the first option and reverted back to v 8438. But when I re-launched it, I got the same message.
So now basically I can't open/use HM. What to do now?!?