I downloaded Yacoby's Wrye Mash, and I can't get it to start up. It started up when i first installed it, and now nothing happens when I click it. I don't even see it running in the background. So maybe I've downloaded the wrong version. Can anyone link me the newest version of wrye mash?

The easiest to install is by far the http://download.fliggerty.com/download-58-141 version.

More info on various versions can be found in the Mash thread: http://www.gamesas.com/topic/1449775-wrye-mash-thread-6/

And we can continue there, as these types of questions are best kept in one thread.

https://github.com/Yacoby/Wrye-Mash/downloads

There's a link to Yacoby's latest version. If you don't want to mess with installing all the various python bits, then it is probably your best choice.