Absolutely. Revit versions run side-by-side without conflict. Just install to different folders.
No. Your existing Revit 2025 license key works for all 2025.x updates. Autodesk Revit 2025.4.zip
There is no single direct public link. You must log into manage.autodesk.com → All Products & Services → Revit 2025 → View Downloads → Select 2025.4 from the dropdown. If only an .exe is shown, you can generate a .zip by using Autodesk’s command-line extraction tool. Absolutely