How do I set the font embedding to something else than “Installable”? For example, when I export a font using the following settings (embedding set to Editable), the selected embedding level is still Installable (no restrictions).
I tested this on Win 10 ja Win 7 with the same result.
I suspect this is a bug within Windows font properties dialog.
Fonts exported with FontCreator will contain a version 4 OS/2 table. If it uses a version 3 one, then it shows the correct embedding level, but usage of version 4 or later is recommended by the spec. 
Technical details:
https://learn.microsoft.com/en-us/typography/opentype/spec/os2#fstype
Versions 3 and later: The specification for version 3, added in OpenType 1.4, introduced the explicit requirement that bits 0 to 3 must be mutually exclusive.
You can check the correct value through a font manager like MainType.
And if already then already.
For some reason, this command does not work for me, I cannot define that the font will not be editable.
I want to create a font that they cannot open later.
It is possible?
Then you need to select Restricted.
Restricted License embedding: the font must not be modified, embedded or exchanged in any manner without first obtaining explicit permission of the legal owner.