I don’t think your download was complete, and so some files are missing from the Zip file. You might want to clear temporary files for the browser, and then try downloading the file again. Please make sure the file size is 3,838,112 bytes for emed911ep32_portable.zip. I would also recommend you to download the installer version, and then check the digital signature after downloading the file. Then you can export the portable version from the installed EmEditor > Tools menu > Import and Export command.