Don't know about the Guru thing . . .
. . . just trying to help.
SpinRite 6.0 should NOT be used to create a bootable USB (it can) because it will have a very OLD version of FreeDOS on it (not the best for SpinRite 6.1).
But there is an easy work around. Run the sr61.exe (that you just downloaded) as a Windows app. Then follow its instructions, with a USB drive ready to insert when prompted.
This will provide you with a bootable USB stick with SpinRite 6.1 on it.
Now put a copy of SpinRite 6.0 on it, and rename it so it does not conflict with the SpinRite 6.1 exe file on the drive.
For example, you will see a spinrite.exe already on there. That will be SpinRite 6.1 release 2.
Just copy SpinRite 6.0 with a different name, e.g. sr60.exe. You are now ready to go.
When booting with this USB drive, SR61 will auto launch with it's splash screen. After exiting SR to the C:\> prompt, you may run either version of SR as desired.
I see you are already ahead of me
, but I am posting anyway as there is some good info in here.
Edit: DUH! SR 6.0 did NOT precede USB. What was I thinking? Possibly thinking BIOS - that DID precede USB. Anyway, I have corrected my SpinRite 6.0 comment.