The official source for downloading LigPlot+ is the at EMBL-EBI . Because the software is licensed, you cannot download it directly without credentials.
Go to the LigPlot+ download page , register for academic access, and you'll get a downloadable Java-based executable. If you just need a quick diagram, use the online version — no download required. ligplot download
Installation is generally "portable," meaning you extract the folder and run the Java file directly. The official source for downloading LigPlot+ is the
Groups Thornton Software > Ligplot+ LigPlot+ is a successor to our original LIGPLOT program for automatic generation of 2D ligand- If you just need a quick diagram, use
LigPlot + v.2.3 - ligand-protein interaction diagrams - EMBL-EBI
– Visit the LigPlot+ Academic Licence page and fill out the form using your institutional email address (e.g., .edu or .ac).