Xxel.iss.axx.zip

The file appears to be a compressed archive containing an encrypted file. Based on the file extensions,

: Use a tool like WinZip , 7-Zip, or the native "Extract All" feature in Windows or macOS. XXEl.iss.aXX.zip

: Once extracted, you will need the AxCrypt software to open the .axx file. You must have the password that was used to secure it. The file appears to be a compressed archive