Cannot modify a via

Using Fritzing 1.0.1 on my Kubuntu 24.04 linux system.

After installing I cannot modify a via or a Hole. When changing for instance the hole diameter nothing happens after setting a new diameter. Everything keeps unchanged.

All other components (resistors) I can change the parameters. What am I doing wrong or what did I forget to do first.

All right, no response but in the meantime I solved it.