How to download and setup Ref12
Open terminal and run command
                                            git clone https://github.com/SLaks/Ref12.git
                                        
                                        git clone is used to create a copy or clone of Ref12 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 Ref12 https://github.com/SLaks/Ref12/archive/master.zip
Or simply clone Ref12 with SSH
                                            [email protected]:SLaks/Ref12.git                                    
                                    If you have some problems with Ref12
You may open issue on Ref12 support forum (system) here: https://github.com/SLaks/Ref12/issuesSimilar to Ref12 repositories
Here you may see Ref12 alternatives and analogs
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