It seems like it's not possible. I had a look into the .ohk file, which showed me a bunch of exported codes, although not all of them. Maybe an option would make sense, enabling us to export single commands?
Yeah +1. I've wanted to see that and individual FileTypes entries be import and export capable for awhile. Mainly to share single actions or sub-menu's full of actions with other. FileType Groups too.
We'll add clipboard commands to the Hotkeys page in the next update (so you'll be able to copy a key to the clipboard to share it, etc).
Re: Filetypes - you can already export and import single file types, using the commands in the File menu.