Perhaps the most significant reason for the legacy hunt is the freemium wall. In earlier versions, the standard definition (480p/SD) watermark was often considered unobtrusive, and many features were available without a subscription. Today, high-definition output and key features are locked behind a recurring payment plan. For the casual user who doesn't need 4K streaming, tracking down 4.0.52 is a way to bypass the subscription economy.
To prevent the old version from prompting you to update to a new version: download manycam 4.0.52 old version
(Note: I will not provide direct links to potentially unsafe download mirrors unless you ask me to search for them; if you want a search, say “search for ManyCam 4.0.52 download”.) Perhaps the most significant reason for the legacy
During installation, Windows will ask: "Do you want to install this device software?" Click —this is the ManyCam virtual driver. Without it, your apps won't see the camera. For the casual user who doesn't need 4K