F2 Key (Rename) Stopped Working

[J-Mac]

This is weird! My F2 key no longer works to rename Info Items in the tree. I thought perhaps that my keyboard was acting up somehow, but F2 is working in other applications. And the balance of function keys are all working OK in UR.

Just the F2 key when an Info Item is highlighted in the tree.

Is there any setting that I might have set inadvertently that would affect the use of the F2 key for renaming items?

Running UR Pro 3.5b on Windows XP Pro SP2. Logitech G15 corded USB keyboard.

Thanks.

Jim