After 1.4.3.2, Team Cherry only pushed tiny "steamwork" updates (like 1.4.3.3 or 1.4.4.0) that updated the Steam API or added language localization for Brazilian Portuguese. These do not change gameplay.
: Resolved an issue where the game slowed down over long sessions. Hollow Knight 1.4.3.2 Download
: Resolved a major issue where Nail Arts could lose their ability to deal damage and fixed various "softlocks" in the Trial of the Fool. Platforms and System Requirements After 1
Because this is an official, automatic patch, you don’t need to hunt for manual files or risky third-party sites. Here’s how to get it on your Switch: : Resolved a major issue where Nail Arts
Using a deprecated version is fine. Stealing the game is not.
Thus, is effectively the same as downloading the "latest version" on Steam today. The only distinction is that if you use the GOG offline installer (1.4.3.2), you will avoid those minor steam-specific API calls.