The program still isn't discoverable in Unity. As a side note, looking in the /usr/share/applications directory in Nautilus shows the application and double clicking launches it, but it doesn't seem to be visible when listing the contents of the directory on the command line. I don't know why this would be.
As part of the big bug review for 16.04 LTS, I have tested this on 15.10 and the bug is still there.
I installed the "Receiver for Linux" from here: http:// www.citrix. com/downloads/ citrix- receiver/ linux/receiver- for-linux- 1321.html
The program still isn't discoverable in Unity. As a side note, looking in the /usr/share/ applications directory in Nautilus shows the application and double clicking launches it, but it doesn't seem to be visible when listing the contents of the directory on the command line. I don't know why this would be.