New user questions

1) I'm using menus to categorize my programs. If I hover over one of my menu headers I get something that I think is useless -- an icon of a file folder and the same word that is already there. I have to click to open the first menu. After that, hovering opens menus. I can't find any setting that will make hovering open a menu without a click.

The option you need is:
TLB Settings->Mouse->Popup menu on mouse hover

2) I want "large" (I've set the size) icons for things that are not in menus but small icons in the menu lists. I managed to make my first menu so that every time I add something to that menu the icon is small, but after that one, I've been having to set the size of every icon in every menu. What am I missing? Global is fine -- I don't need to adjust the size of anything individually if I could get this to work with large for non-menus and small in menus.

If you want small icons in menu, right-click in the menu and select View->Small Icons
Now all new items will be with the small icons. This option does not have effect for the menu items for what you've changed icon size individually.
BTW, in the "Customize buttons" dialog box you can select some items in the list, holding SHIFT or CTRL keys and click.