No problem, but, your patience will have to be greater. I dont run Netscape and am only learning what I can to help. I can give you some stuff to get you started but you will have to follow through.
Anything that has to do with a the person's profile, history, bookmarks, anything that you find in the users folder, like dictionary can be deleted if you have a problem with it. It will create a new file for you and this will get rid of the corrupt file. Any part of Netscape that doesn't work like it should is most likely a corrupt file. Actually if you want to you can delete the user folder and then create a new user profile and it will do the same thing. I find it much easier to just delete the file that causes the problem.
Two other files that cause a lot of problems in Netscape are the pref.js files. These also can be deleted and Netscape will create new ones.
If you experience problems with a certain profile or several different profiles, there is most likely some corruption in the user files. You need to create a new profile in order to resolve this issue. To do this:
Shut down Communicator.
Go to the Start menu and choose Programs, Netscape, Utilities, User Profile Manager.
Create a new profile for yourself using all of the information from your old profile (i.e. Mail server settings), making sure to name the profile something different so that it doesn't overwrite your old profile.
Check to make sure that the profile is working. If it is, shut down Communicator.
Open Explorer and go to your User directory at: C:\Program Files\Netscape\Users\.
Find the old profile name, and copy the Mail folder, the News folder, the bookmark.htm file, the abook.nab file, and any .na2 files into the new profile directory.
Check to make sure that everything is working and go back to the User Profile Manager to delete your old profile.