Moving/editing a path point

This would use the last Path in the list, so better include a check that there are indeed Paths apart from the Vector Mask:

// 2017, use it at your own risk;

#target photoshop

try {

// =======================================================

var idDlt = charIDToTypeID( "Dlt " );

    var desc2 = new ActionDescriptor();

    var idnull = charIDToTypeID( "null" );

        var ref1 = new ActionReference();

        var idPath = charIDToTypeID( "Path" );

        var idvectorMask = stringIDToTypeID( "vectorMask" );

        ref1.putEnumerated( idPath, idPath, idvectorMask );

        var idLyr = charIDToTypeID( "Lyr " );

        var idOrdn = charIDToTypeID( "Ordn" );

        var idTrgt = charIDToTypeID( "Trgt" );

        ref1.putEnumerated( idLyr, idOrdn, idTrgt );

    desc2.putReference( idnull, ref1 );

executeAction( idDlt, desc2, DialogModes.NO );

// =======================================================

var idslct = charIDToTypeID( "slct" );

    var desc5 = new ActionDescriptor();

        var ref2 = new ActionReference();

        ref2.putIndex( idPath, activeDocument.pathItems.length );

    desc5.putReference( idnull, ref2 );

executeAction( idslct, desc5, DialogModes.NO );

// =======================================================

var idMk = charIDToTypeID( "Mk  " );

    var desc6 = new ActionDescriptor();

        var ref3 = new ActionReference();

        ref3.putClass( idPath );

    desc6.putReference( idnull, ref3 );

    var idAt = charIDToTypeID( "At  " );

        var ref4 = new ActionReference();

        ref4.putEnumerated( idPath, idPath, idvectorMask );

    desc6.putReference( idAt, ref4 );

    var idUsng = charIDToTypeID( "Usng" );

        var ref5 = new ActionReference();

        ref5.putEnumerated( idPath, idOrdn, idTrgt );

    desc6.putReference( idUsng, ref5 );

executeAction( idMk, desc6, DialogModes.NO );

} catch (e) {};

Edit: I’ve tried to remove all double-definitions but the code might be cleaned up some more.