I already uninstalled the Connect program,
but still every time I start my browser 1-3 advertising Tabs open for Musicmaker.

I own an old version of MM and got me a newer one in a (humble) bundle.
I find that behaviour VERY annoying and ask URGENTLY here for steps to stop that.
(I already have installed a website blocker, but now the Magix tabs are replaced with the blocker tabs as it thinks I WANT to visit Magix and does not let me)
Regards