There is no 64-bit control panel, only the 32-bit control panel. The 32-bit Flash Player files will be in Windows/SysWOW64/Macromed/Flash and the 64-bit Flash Player files will be in Windows/System32/Macromed/Flash.
Start the 64-bit I.E. and go to:
If you see the spinning F, the 64-bit Flash Player is installed.
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If it has really only the 32-bit version installed (check if you have it in C:\Windows\system32\Macromed\Flash), then you can download the 64-bit installer from http://forums.adobe.com/thread/909550
Thakss for the replies, much appreciated. Confirming that I get the "spinning F" and also that the Macromedia\Flash directory has Flash64 files inside so looks like it has in fact installed the 64bit version. Thanks again.