Photoshop Elements 10 - 'Save As' text no longer displaying existing file, which matches the text so far entered

Question

Photoshop Elements 10  (On Windows 8.1 64-bit laptop)
Until recently, 'save as' showed any existing file name, which exactly matched the text so far typed. 
That's particularly useful when creating multiple photo files, with suffixes of '(1)', '(2)', etc.
Suddenly that great facility has stopped, forcing me to always type the complete file name for each new item.
I assume that a setting has been lost.
How do I get it back?

Answer 1

Thanks again.
I held the keys down for at least 15 seconds in my previous attempts.  
I’ve just tried the entries, holding the keys for around 30 seconds, with the same results (or lack of same).
Thinking about my thought of copying the Preference settings from the same program on my desktop, I looked on the Internet for Photoshop Elements 10 Preferences file locations.   I found a display, which suggested:  C:\Users\user name\AppData\Roaming\Adobe\Photoshop Elements (9.0\10.0\11.0)\Editor
From that, it appears that mine may be held in:
C:\Users\Fred Niven\AppData\Roaming\Adobe\Photoshop Elements\10.0\Editor
But I’m reluctant to copy any such file from my Windows 8.1 desktop’s Photoshop Elements 10’s file(s),
to replace the equivalent file(s) on this laptop, until I know that I’m replacing the correct file(s). 
I’d create a System Restore Point beforehand anyway, just-in-case.
Cheers,
Fred
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