Question

How can I convert my custom setting's files from Exposure 3 to Exposure 4? Do I have to recreate all of them in Exposure 4?

Answer

The settings should automatically be converted and imported into Exposure 4 the very first time you run it. You can also re-run the import process by going to Exposure 4's preferences dialog (the ? mark at the bottom of the user interface). Then click the "Import" button at the bottom of the dialog. 

Note: Not all Exposure 3 settings are compatible with version 4. If your preset is not compatible it will not show up.