Maybe users should be told how to revert changes that are made on this popup if they click "always use this answer." with another message that pops up after the change has been made.

Example:

1st popup
LimeWire is unable to find a license for this file. Download anyway?

Please note: LimeWire cannot monitor or control the content of the Gnutella network. Please respect your local copyright laws.

[ ] always use this answer
[Yes] [No] [Cancel]

2nd popup
Notice: You have set this message to always choose [yes/no]. To change this option at any time goto Tools > Options > Searching > Basic to turn [on/off] the license message.