Regarding the download for Patch 6, the standalone wallet should be found here (note that the fix at block 625,000 did not work so the dev is reworking the solution to PoW right now):
So where is the link for the patch 6?
It was in the quote from Cryptocoderz below that sentence. The only link that I could find in the thread for patch 6 was the standalone client, so if you want the auto-updating one, you will have to reinstall it next time. I figured that people would want to download it directly from the dev's post, but since it there was a lot of text you may have missed the link, so here it is as well:
Espers-v0.8.5.1-Patch6-qt.zip