Cool. I understand it's not your fault, just a little cautious about running executables marked as dangerous. Thanks!
Edit: Developer still has not replied since that message. First comment still stands, avoid until they give a response.
Edit: please disregard the below. Developer seems to be fixing issue. In the meantime I'd still avoid it until they provide an update to the situation.VIRUS!!!
Windows Defender recognizes Horologium.exe as malicious software (Trojan:Win32/Wacatac.B!ml). Until the developer offers a reply, I strongly recommend to NOT BUY this.