I'm looking for a Houdini Indie download.
Now I know your site has SideFX Houdini FX 18.5.596 WIN 64 for download, but it looks like it is a Commercial (Studio) License.
I have an Indie file (.hdalc) that was developed by a legitimate Houdini Indie user, and I can't open it with my Studio Licensed Houdini:
> Houdini License issue - (filename.hdalc) : (Finished installation with Errors: HAPI Error: Limited commercial (Indie) assets not allowed with commercial licenses.).