It is still not possible to add more than one feed or subscription, even with 1.4.1.
Info: I am using Deluge in thin-client mode, with the server running Debian Jessie with Deluge version 1.3.10 (Python 2.7), and the client running Windows 10 with Deluge version 1.3.12 (Python 2.7 -- Yes, I'm sure). I have installed YaRSS 1.4.1 on both the client and server and restarted both numerous times, as well as disabled and re-enabled the plugin several times. Upon attempting to add a subscription, the window that appears says "Add Subscription", but clicking "Save" overwrites my previous subscription. The same is true for RSS feeds. I have unpacked the egg and have confirmed that the fixes in <<cset 27e2d6535132>> are present.