These events were from 2 different install / run attempts. I've tried leaving default location and I've tried using custom path c:\program files\streamfab. Yes I have followed the "guide" on clean uninstall / install.
Ok, I was not aware of that, so dismiss that post.
People have to ask this several times due to other users not following a clean installation. Usually, something with the streamfab cache and temp folders causes crashes.
Or a bad installation. I can only end with, since others say streamfab does work with Windows 10, is again make sure it's got all the final updates.
Or it's still the security software on the system. Maybe even try, if you want, to uninstall Avast. And use a 3rd party uninstaller for that as well.
SF works fine with Windows 11 Pro with just Windows Defender/Firewall, and I added Malwarebytes to my system for extra security against malware. Anyone can use it for free and try it.
Or delete the current streamfab.log and then run streamfab till issues happen and send the new StreamFab.log off to their support. Maybe send the crash report to them also?
Do that through the member portal.
And you may find you need to bug them every other day to help. I would usually say demand your money back, but I think no matter what, it's like 14 days.
They need to revise that to if they can't or won't fix the issue, you can get your money back, as from what you say, you can't use the software.
I guess, though, you risk situations like this with most software unless they have quality support.
There is no official support on the forum other than Wilson Wang, and he's had no activity for about a week.
And even at that, does not have all the answers.
Hope it eventually works ...