iMac can't open LibreOffice 4.1.5 updater -- wrong file format?

RE: your updater from MacOSX currently-installed Version: 4.1.4.2
Build ID: 0a0440ccc0227ad9829de5f46be37cfb6edcf72
was supposed to download 4.1.5 ... but this version downloaded instead and in a format I can't open.

Should I try to run an updater for this? An automatic notice asking me to click on the icon in the menubar prompted me to visit your site today. And while there I tried the donate page. When I first saw this I didn't because it wasn't a secure page; but today I tried initiating a donation and then the secure page opened. OK, done.

However, the download page was confusing to me. The icon in the green bar with "download" and an arrow on it didn't trigger any process as I would normally have expected. Eventually I tried a hypertext link which resulted in the impasse shown in the screen capture, i.e. that it's in a format my Mac doesn't recognize.

I currently have Lion 10.7.5 running. Is there a file format and a clear download button for Macs?

Thank you for the user manuals which I downloaded in this program's format. (I don't want pdf versions anymore because Adobe's client program so often fails to open downloaded files.)

Thank you for any suggestions.

Mary-Sue Haliburton
Ontario, Canada