How to download and setup erd-editor
Open terminal and run command
                                            git clone https://github.com/dineug/erd-editor.git
                                        
                                        git clone is used to create a copy or clone of erd-editor repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with erd-editor https://github.com/dineug/erd-editor/archive/master.zip
Or simply clone erd-editor with SSH
                                            [email protected]:dineug/erd-editor.git                                    
                                    If you have some problems with erd-editor
You may open issue on erd-editor support forum (system) here: https://github.com/dineug/erd-editor/issuesSimilar to erd-editor repositories
Here you may see erd-editor alternatives and analogs
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