How can I fix NVIDIA Texture Tools?

Hi! I have been using NVidia Texture tools for some time. Version 2020.1.3 Was perfect for me and it helped me edit my DDs files Now, the 2021 version doesn’t work at all for what I need to do. I cannot properly open and save my files how I need to. Is there any way that you can provide me a download for version 2020.1.3? It would be extremely helpful