This software implements the PathLinker algorithm for reconstructing signaling pathways from protein interaction networks as an app for the Cytoscape software. You can download the app on the Cytoscape app store at http://apps.cytoscape.org/apps/pathlinker or from within Cytoscape directly.
Please refer to the documentation for detailed instructions, screenshots, an example workflow and contact information: http://pathlinker-cytoscape-app.readthedocs.io/en/latest/PathLinker_Cytoscape.html.