compile examples under 3.6

[Louis . Masters]

I'm running into an issue trying to compile the examples under POI 3.6:

    [javac] business\freightbidding\BusinessPlan.java:67: incompatible 
types
    [javac] found   : org.apache.poi.hssf.usermodel.HSSFWorkbook
    [javac] required: org.apache.poi.ss.usermodel.Workbook
    [javac]         if(args.length > 0 && args[0].equals("-xls")) wb = new 
HSSFWorkbook();
    [javac]                                                            ^


Did the structure change?  Has anyone else gotten this error?

Thanks,
Lou