Changing the default view for the Duo player can be done with a registry entry.
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Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Sanako\Lab\Lab300\Duo\Synchronization]
"Font name"="DejaVu Sans"
"Font size"=dword:0000000a
"Font bold"=dword:00000000
"Font italic"=dword:00000000
"Font charset"=dword:00000000
"AACC Answer Time"=dword:00000003
"Show Subtitles"=dword:00000001
"Hide Video CloseButton"=dword:00000000
"Show Graph"=dword:00000000
"Separation Marks"=",.;:"

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The important bit is the bit that says:
"Show Graph"=dword:00000000
It can be changed to graph view by setting the value to 00000001

Per Eoin's request I'll send this reg entry out to the labs to make them use standard view.