Adonis Free… Cannot upload update from 1.3.6 to 1.3.7 ??

I have tried uploading by clicking on the direct update link in my dashboard, and also downloading and uploading the update Zip file. And, I get this error message: An error occurred while updating Adonis: Download failed. The checksum of the file (d41d8cd98f00b204e9800998ecf8427e) does not match the expected checksum value (122a488097c552a44af61f807c416789). What is that telling me?