To run this application:
Just download a version compatible with your Operating System.
Extract the contents of the compressed file you downloaded (.zip or .tar.gz).
The folder "SimulIDE_x.x.x" contains all necessary to run the program.
Executable is in this folder, just double-click it or run from a terminal if you want to see some messages about SimulIDE execution.
You can copy this folder to whatever location you want keeping the internal structure as it is.
Don't move, edit or delete files unless you know what you are doing.
You don't need to install anything else unless you are compiling yourself. Then you need to install these dependencies.
Graphical User Interface:
It is divided into 3 main panels.
All panels are resizable and collapsable.
Left Panel:
In the left panel therea are 2 tabs:
- Component list to select components and add to the circuit.
- File explorer to browse your file system and open files in the circuit or editor.
Central Panel:
- Circuit Tool bar at the top with actions and information about the simulation.
- Circuit canvas in the middle, here is where you create and simulate your circuits.
- Message panel at the bottom, showing debug messages and errors.
Right Panel:
In the right pane is the Editor/Compiler/Debugger.
It also has its own Tool bar and Message panel.
This is a text editor with basic coding and debugging functionalities.
Creating circuits:
To create a circuit, just grab components from the Component list and drop into the Circuit canvas.
Then click in a Pin to start a wire and click in another pin to end the wire.
You can zoom in/out with the mouse wheel and pan with left button.
Right-click in the canvas to open the Circuit context menu.
Simulating circuits:
When you complete your circuit, click the Power button: 
in the Tool bar to start or stop the simulation.
You can pause the simulation with the pause button: 
Resources:
- Video: SimulIDE1.0.0 basic use: GUI