What Is A MD5 Checksum?
When a new software release is made a MD5 checksum is created. This checksum is then published together with the file to the web site. After you have downloaded the application you run the file through a MD5 checksum creator and compare this value against the value published to the web site. If both checksums are the same it is unlikely the file has been corrupted, illegally patched or released by someone other than Really Effective. If the verification fails ensure you are downloading the file from the official site and that your download is not corrupted.