This problem is now resolved, thanks to the kind assistance of Klaus Hartnegg [mailto:hartnegg@gmx.de]
searched my computer for *.msi and found "install_flash_player_15_active_x.msi",
Moved it to the directory with "install_flash_player_10_active_x.msi". deleted the 10, renamed 15 to 10 (to fool the QB installer),
deleted HKEY_LOCAL_MACHINE\SOFTWARE\Macromedia\FlashPlayer\SafeVersions from the registry.
The Quick Books Premier 2011 installed normally.