Firsrt off all, great app and great service.

Now i have some question.

So i want to install programs like, Opera, Microsoft Defender, and some others programs. Now in order to add that to LiberKey, i need to install on my pc?

ty

Sorry but I do ot really understand your question

I want to know how can i add others programs to this app. Programs that aren't listed on website/app.

Liberkey's apps are portable so you can use it from an external drive like a USB key for example.
You can found some portable application on others sites (http://www.portablefreeware.com/ for example) and add them in your compilation (MyApps directory) but a lot of apps like Microsoft Defender aren't portable.

JP4U