Hello and welcome on forums.
One of the advantage use portable apps is that you can effectivelly use them on a computer and a Pen drive, and you can synchronize their folder when one of the two Liberkey is running .
In the Liberkey you can found two apps for synchronization :
DSynchronize or
FreeFileSync.
For the first problem to install apps, you can manage apps with the
online catalog. On it you can use the button
Sync my Liberkey with the website.
Another way is using in Liberkey menu
Liberkey Tools => Manage application => Browse the application catalog .
If you prefer install one suite you can found under it
Liberkey Tools => Manage application => Install an aplication suite .
In these tools you can see if some apps are installed, have some update, or aren't already installed.
To remove apps you can use
Liberkey Tools => Manage application => Add/Remove programs.
JP4U