a is d - I have not spent a lot of time on AOL's 'system' as I only use it for internet access and run OE and IE through it quite successfully, so I'm not too au fait with the bits and pieces.
If you type uninstall into the AOL help search box it will show you how to save the files and emails. As to 'favourites' I'm not sure. I have a feeling they are kept too.
If there is an option to print the help file off I would recommend it if you are unsure!