We do not have a download file for the latest version (1.3.1.1843), but you can try downloading it from the developer's site
Download version 1.0.2.3819 from Mac Informer
Version: 1.0.2.3819
Date update: Jul 2, 2020
File name: ob-xa_v_1_0_2_3819.pkg
Size: 301 MB