"Insert Key" button: What does it do?

Yuri: I installed your new True Paste this morning, and I like everything about it so far, but I have one question and one small request:

Question: What is the function of the Insert Key button? (I've tried playing with it and can't see that it does anything other than put the keyname in the chunk panel.)

Request: Could we have an option (in Settings) to have True Paste exit after the pasting button is used, instead of just minimizing to the Notification Area? (I have a TLB hotkey set to bring up TP when I need it, and if I need to paste something more than once, I can use the clipboard copy. I don't need the icon always in the tray.)

Thanks for a great new toy!