Taskmanager flooded with nimbus- instances

Taskmanager flooded with nimbus- instances

Since Reinstall on April 15 Nimbus app closes incorrectly. Each time I start the win-app it starts 5 to 8 tasks.
Formerly they all disappeared, when the app was closed. Now the remain (and use CPU and memory)

Today, after using and closing nimbus about 8 times I find over 30 entrys consuming my resources.
I attach a screenshot of it.
Seems that nimbusnote.exe  (size: 124.774.048) that I fetched is defect.
To clean this, I have to restart my PC - not useful as it is a 24/7 Installation.

What to do?