I have Houdini 15.5.607, educational version, on a Centos 7 machine. Everything was working fine, but recently I've run into a problem. When I click in the network view, hit tab, and start typing, the autocomplete feature is not working any more. It's actually kind of a pain to use Houdini without that little convenience. Does anyone have any idea if there is maybe a KDE desktop setting I messed up, or is there a Houdini fix? Any ideas appreciated.

I re-installed Houdini. That did not help.