With the settings you posted there will be stil to versions loaded, you need to disable the load of jquery via
<add key="YAF.DisableJQuery" value="true" />
Yes, I understand, thank you.
Moreover, version YAF 1.9.6 (was 2.1.2) is the same version of jQuery 1.7.1 that my site.
But there is a new problem.
Namespace YAF.Properties is in the sources in C#, but disappears in YAF.dll !
Because of this, when you build the solution - error: YAF.Properties.Setting unavailable because the type name access level or namespace is not in the namespace "YAF" (are you missing an Assembly reference?)
An Assembly reference is definitely there. Moreover, I was several times rebuilt the Assembly again.
As a result, the namespace YAF.Properties is in the source, but is not in the Assembly YAF.dll .
I don't understand anything...