If you need to revert to this specific version for project compatibility, you can do so through the Adobe Creative Cloud Desktop app : Open the tab.
Improved performance for Windows systems with Intel Quick Sync or NVIDIA/AMD GPUs. Adobe Premiere Pro 2021 v15.1
7th Generation Intel or AMD Ryzen 3000 series / Threadripper 2000 or newer. If you need to revert to this specific
This version continued to refine the auto-captioning tools introduced in the 15.0 update, allowing editors to automatically generate captions from the Text panel. Adobe Premiere Pro 2021 v15.1