You can download the original disc image directly from the Microsoft Content Delivery Network (CDN). This file contains both 32-bit and 64-bit installers. MSSoftware Download the Image: Use this official link for Visio Professional 2019 Retail Mount the File: Right-click the downloaded file in File Explorer and select Choose 64-bit:

Microsoft Visio 2019 Download-- 64-bit Offline: A Comprehensive Guide

: The 64-bit version allows the app to use more RAM, improving performance when working with large, complex diagrams. Intelligent P&ID Software System Requirements for 64-bit Installation