Here is the means to back up your profiles in the simple means all have been looking for.
The FFF profiles are specifically stored at
in the key called profileDatabaseContents
It's an XML formatted string.
I agree there is no reason why this is not allowed as a simple write to file. But below. I have provided that functionality.
reg export "HKEY_CURRENT_USER\Software\Simplify3D" C:\Simplify3D.reg
Reg import C:\Simplify3D.reg