fixmestick is very misleading on their website.
“NO software”… eh eh eh
It has a OS, it has 3 av’s on it ( https://www.fixmestick.com/images/content/fix-me-photo4.jpg )

And…
“Try the FixMeStick on 3 computers for 30 days for only $9.95 + shipping and handling.”
Why paying for a trial ?

It is real easy to create one yourself :
https://forum.avast.com/index.php?topic=53253.0 > If you cannot Boot the computer
Instead of OTLPE use Rufus if you want a usb stick and not a cd/dvd.
You can throw every (free or paid) tool on it as you wish.