What does the "MD5" directly behind the download Version mean on the mapparium page?
To check the integrity of your downloaded file. You'll need a suitable program to generate an MD5 code from your download, which will hopefully match the code given on the download page...If it does match then your download is perfect. Normally useful when downloading huge files, or when you need to know for sure that your download is perfect. I wouldn't bother testing the MD5 on something as small as this.