Installed a program to a non-standard location
 

A program (Pycharm) installed to a non standard location (/usr/local/bin) and does not get displayed in KDE menus and is not in the path when I try to run it from the command line interface.

How can I add its launcher to KDE panel / menu?

Create a symbolic link? ln -s /path/to/target /path/to/link or so...

you can create a desktop file under ~/.local/share/applications/
or in the default location, /usr/share/applications

you can research about desktop files, possible start here
http://techbase.kde.org/Development/...s/Desktop_File

/usr/local/bin should be in your PATH by default, if not you can add it