I just checked mine and all the presets appear.
On my system (a Windows PC) , the B-3X presets are in the following folder.
%USERPROFILE%\documents\ik Multimedia\hammond B-3X\presets
Maybe try reinstalling Hammond B-3X>
If that does not fix the issue, then maybe IKM support can help.
https://www.ikmultimedia.com/contact-support/sw/