"Does anybody know if they showed up for the Neuroscience 2019 presentation?"
Newb1000,
Yes, it appears that they attended and presented their poster at Neuroscience 2019. Here is their poster from the company website:
Apabetalone Epigenetically Inhibits Monocyte Adhesion to Brain Endothelial Cells by Downregulating Key Neuroinflammation Markers In Vitro and In Vivo