How to correct 'Navigation Canceled' when accessing help:
In an effort to increase system security, Microsoft no longer alows the viewing of HTML Help files (.CHM) that reside on a remote hard drive, such as a server, without modifying the system Registry. To allow access to view the Help files you will need to either Modify the Security Settings or Copy the Help files to Local Drive. From the Main Menu, select Utilities>Technical Support Utilities. If prompted, select Program Directory. In Utilities, select Actions>Special Edits and Actions>HELPFILES and OK. make your selection, either Modify the Security Settings or Copy the Help files to Local Drive. Click Ok and the program will close. Reopen the program and you should be able to access the Help Files.