I experienced this last night after updating my anyconnect license on the ASA. So glad you already found the solution. Saved me from myself today. Thanks for sharing!
I can confirm this method works. Talk about night and day performance too. I just deleted all the feeds as I never used them anyway. Also, if anyone is wondering, IME works just fine under Windows 10 Pro x64.
I have the same issue on Windows 7 Pro. I even rolled back java to an older version and reinstalled IME. Nothing has worked. I have it running properly on another machine and a Windows 7 VM without this error as well. Only problem with the one on...