oldmangrumpy's should work but as an explanation of those icons
Sometime you have inadvertently clicked on the core pointer icon. By default Gimp remembers last settings
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01-toolbox.jpg [ 70.86 KiB | Viewed 23 times ]
You have (1) and you want (2) Click on the left side icon for tool options. Gimp will (should) remember. You can make the GUI easier for yourself and close any unwanted icons (3) See oldmangrumpy's screenshot with only tool option
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The basics are in Edit -> Preferences -> Tool Options. You can untick
Save... on Exit (4) if you want and if nothing works then use
Reset...to Default Values (5) (
and the same in the Window Management section )
I have often thought that Gimp should have a "Simple Mode" with a reduced GUI