The 'Filter' window has too many UI elements, which leads to a confusing and intimidating interface for users. It should be simplified and possibly broken into separate windows.

Currently the 'Filter' UI includes radio buttons to choose which state's data to filter, a slider to truncate the state production data from one direction, and several text boxes to filter by a given range. It would most likely be easier to use if:

1. The window had a help menu.
2. The window spaced out the UI elements a bit more with more useful headings indicating to the user more clearly the intent of each mechanism.
3. The buttons were more clear. Currently there is a 'Filter Range' but it only applies to the text in the 'Filter Range' section. Maybe the 'Filter Range' button could be removed completely and the range filter was activated by just pressing 'Enter' on a text box.
4. Hitting 'Enter' on the range text boxes resets the original value. This is confusing for users who are accustomed to hitting 'Enter' to 'save' a value. The 'Enter' button should either activate the value in the box or not perform any action at all.
5. Finally, is it useful for users to have both a slider and range filter mechanism? The range filter UI could accomplish the same task but some users might prefer the visual layout of a slider as an additional option. Maybe these two components should be on a different window or separated somehow so the user only has one filter mechanism at a time?