I'm not sure you wrote to the right place. Here we talk about Sweet Home 3D, sometimes written with SH3D or SW3D acronyms, but it's the first time I see HSH.
What HSH stands for or where did you see this acronym?
Which Apps Store were you redirected to?
By the way, the latest version of Sweet Home 3D is 5.3 and not 5.1.