Plugins for Cura - UM2+ Connect

[fazeday 0]

Hi all.

 

I often see youtube tutorials where they recommend to install different plugins for Cura.

 

Recently i wanted to install the "Calibration shapes" plugin, that is described here : 

 

 

I see it in the plugins list, however i am required to login to my UM account to add it to cura.

 

Once i have done that, i only see like 13 plugins - and it said that "the author does not exist".

I asked Ultimaker for support, they said it is because that plugin was not updated to my version of cura.

I now run 5.3 Xmas - but i tried with 4, 5, 5.1 and more - it remains the same.
13 plugins and no more, see screenshot.

 

What can cause this?

 

Any help appreciated - thank you.