A: Yes – using Steam Betas as described above.
If you specifically need version 1.4.4.5 (e.g., for certain mod compatibility), note that it was a hotfix update focused on stability: How to downgrade PC to 1.4.4.5 | Terraria Community Forums best download terraria 1445 pc 2021
For those looking for specific older versions, Steam allows access to select "legacy" branches like 1.0.6.1 ("Undeluxe Edition") or 1.1.2 through the "Betas" tab in the game's properties. Terraria Roadmap (2021 vs. Present) A: Yes – using Steam Betas as described above