I am running IOS Yosemite 10.10.5. Since the Kindle App for my Mac updated to support the beta IOS El Capitan it's seriously faulty! Crashes, mostly crashes. When I get it to stay open for awhile, It shows fairly new stuff only, and just notifies of a failed download on ALL new books. I spent an hour and 6 Amazon agents in a chat session and they will not supply a previous version, but all those having issues must wait until they resolve the issue. How/Where do I get the version of the Kindle app prior?