To update the source follow this steps:

• Close NetBeans
• Rename folder <path>/dataweb_src/ to <path>/dataweb_src_OLD/
• Download form sourceforge the Source
• Extract the source in <path>
• Copy all instance files (instance_*.properties) from <path>/dataweb_src_OLD/server/workdir to <path>/dataweb_src/server/workdir
• Copy the folder data form <path>/dataweb_src_OLD/server/workdir to <path>/dataweb_src/server/workdir
• Copy any files you modified into the corresponding paths
• Open NetBeans
• Run Menu "Clean and Build Main Project"
• Remove folder <path>/dataweb_src_OLD/