Hi AmigaSystem!
For HiP, it happens to me sometimes too, it's a "bug" in HiP. I reported it something like that to Koobo already...
For the ClassAct GUI, try running
CAPrefs (the ClassAct prefs daemon) or launching the prefs program
.../ClassAct/Prefs/ClassAct, it should fix the GUI.
(
CAPrefs could be run from your User-Startup.)
Let me know!