Version 1.4.4.5 is a stability and polish patch following the massive update. This update was a gift to the community, focusing on "Quality of Life" (QoL) improvements rather than just adding a final boss.
: The addition of the Void Bag overhaul (acting like a second inventory) and the Shellphone (combining all teleportation and info items) drastically reduced menu management. Terraria.v1.4.4.5-GOG.zip
: Because it doesn't require an online check-in, GOG versions are ideal for offline play or keeping on a thumb drive. Version 1
: The biggest advantage of the GOG version is that it is completely DRM-free. You do not need a launcher (like Steam) to run the game. You can simply unzip and play. : Because it doesn't require an online check-in,
: Resolving crashes related to the Mac/Linux versions.
The "GOG" tag in your file refers to the version sold on GOG.com .
If you are looking for the definitive "stable" version of Terraria before the upcoming 1.4.5 update, is it. It represents the game at its most polished, with a decade of feedback distilled into a smooth survival-crafting experience.