Do you remember you were using around October 2021 that might have required a license download?
.txt or .pdf : Likely a "ReadMe" or a legal End User License Agreement (EULA). .lic or .key : Activation files for software. .html : A saved webpage containing license terms. License-20211022T172016Z-001.zip
: Use a tool like 7-Zip , WinRAR , or the native Windows/macOS extraction tool. Do you remember you were using around October