These instructions provide the best way to update a library file when using the McMaster Dreamweaver templates:
Your changes should now be live.
You may wonder why the instructions above tell you to click Don’t update in step 4. The reason is that the left_nav.lbi file is contained in the mcmaster.dwt template and in all templates and pages. So if you clicked Update in step 4, you create a process stream that updates those files. The problem occurs when the mcmaster.dwt is updated. All format*.dwt templates were created from the mcmaster.dwt template. All pages were created from the fomat*.dwt templates. If you clicked Update in step 4, a second process stream would be created when the mcmaster.dwt template was updated with the change to the left_nav.lbi file in order to update all the file that use this template. So then we have 2 process streams running at the same time. Sometimes the two process streams try to update the same file at the same time and Dreamweaver may crash or the file will not be updated correctly. Unfortunately Dreamweaver doesn’t handle this situation the way that it should, which would be to run one stream first and then run the second one.
The instructions above are the way that I found is best to avoid this problem. It works every time.