Not sure if it has to do with “me” factor… 
Follow the installation steps from their website and it should work fine…
Where did you get trouble(s) ?
To be precise, the last. I can install, start, and even log in. However, if you choose the VPN you want to launch afterwards, the app will stop responding from there. It’s the same no matter which VPN you choose.
I’ve tried it twice in the past with a different version of Qube, on different hardware, and the same thing happens. By the way, it is a free account.
Stop doing anything. You must repair your system first. It’s in your other thread.