If you still want to try locating an official trial from FileHippo (unlikely to work without a key), always scan any downloaded .exe with Windows Defender and VirusTotal before running — but the safest choice is to avoid it entirely.
It's important to clarify upfront: from FileHippo or any other legitimate site. FileHippo is a software download repository, but it typically hosts trial versions, freeware, or shareware. However, downloading older commercial software like Visio 2013 from third-party sites carries significant risks. Microsoft Visio 2013 Free Download 64 Bit Filehippo