I have used the export to export my PLD settings from one computer to another. I did not save any other ini files. Big mistake!
I had checked all the checkboxes, but not much was exported, only things like colours and a little DB settings.
In short: unless the user explicitly unchecks any checkboxes ALL settings should be exported.
By now, the following settings are gone: Oracle Home, logon history (store history/store with password, fixed users etc.), hints, object browser, code assistant, appearance (only colors are saved), program window (only colours are saved), SQL window (only colours are saved), test window, backup.
Please, please: give the user a warning that he still needs to backup his ini files to be able to restore all settings.