My arrow keys and backspace no longer works in Sql Developer

In the work sheet of Sql Developer it is not allowing me to use my arrow keys or backspace key, I can use these keys in the result section but not in the worksheet section. When I use the arrow key it scrolls the page but the cursor stays in the same spot. My scroll lock is not on as these functions work everywhere else. I have looked at short cut keys to see if I hit smoething but not finding anything. Any ideas?

This is a known problem practically impossible to reproduce reliably.
It was not reported on the latest releases of SQLDeveloper, so if you are on an old release you might consider switching to the latest one.
The workaround for the problem in older version requires you to load preset values for the shortcut in
Tools -> Preferences -> Accelerators -> Load PresetMind this will erase all your user defined shortcut keys

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<html>
<head>
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</body>
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best regards
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My arrow keys and backspace no longer works in Sql Developer

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