I've made it executable with read and write permissions.
But when I run it, it gets to the point when it asks you to accept the user agreement, and then freezes m entire laptop. The installer UI doesn't change, it still shows the agreement. When I eventually get it to close, the terminal says that it 'couldn't run mojosetup'. I've trawled around the Internet for a bit but couldn't find anything.
I've re-downloaded the file to make sure it wasn't corrupted or anything, but heres the md5sum thing anyway: 649c1bf9d7ccd81553c574ff1bec2cef.