Jamawkinaw Enterprises released Downcast 1.1 in October 2014 with several additions and improvements to the podcatcher app. In addition to adding support for OS X 10.10 Yosemite and iCloud Drive, the update added a new bookmark storage system that enables Downcast to maintain access to content that was moved or renamed using the Finder, Quick Look support for artwork, and the capability to set custom artwork for podcasts. The release also significantly improved performance and stability throughout the app, condensed contextual menus to include only options valid for the current view, tweaked the layout of the podcast and episode detail views, and fixed numerous crashes. Jamawkinaw followed that
release by updating Downcast to version 1.1.1 with fixes for several crashes introduced by version 1.1. ($9.99 new from the Mac App Store, free update, 20.5 MB, release notes, 10.8+)
You might want to hold off a bit on this upgrade. I'm seeing some serious problems with podcast playback (both audio and video) since upgrading to 1.1.1. Pausing and then resuming a podcast will cause it to start playing back from the very beginning instead of resuming where you left off. I've reported the bug to them and they have been pretty responsive in the past so I suspect that this will be corrected soon.