Ok, I think I am getting close. After much research on the issue I found this:
"Here's a workaround for installing the 64-bit version of the Microsoft Access Database Engine 2010 redistributable on a system with a 32-bit MS Office version installed:
• Check the 64-bit registry key "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\14.0\Common\FilesPaths" before installing the 64-bit
version of the Microsoft Access Database Engine 2010 redistributable.
• If it does not contain the "mso.dll" registry value, then you will need to rename or delete the value after installing the 64-bit version of the Microsoft Access Database Engine 2010 redistributable on a system with a 32-bit version of MS Office installed.
• Use the "/passive" command line parameter to install the redistributable, e.g. "C:\directory path\AccessDatabaseEngine_x64.exe" /passive
• Delete or rename the "mso.dll" registry value, which contains the path to the 64-bit version of MSO.DLL (and should not be used by 32-bit MS Office versions).
Now you can start a 32-bit MS Office application without the "re-configuring" issue. Note that the "mso.dll" registry value will already be present if a 64-bit version of MS Office is installed. In this case the value should not be deleted or renamed."
So before I tried this I made a restore point before installing the Access 64bit driver. I installed the driver, got the issue again, then went into my regedit and deleted the MSO.DLL. Now Word and Excel open normally! So this appears to have worked.
But when I open scenProc it says it can't find the AutogenDescriptions.xml and the RoofDescriptions.xml in the 'C:\Users\Clutch\AppData\Local\Temp\scenProc\Extrusions.xml'.
So I manually added them there. However, it is now asking for 'Extrusions.xml', but I cannot find an .xml file of that anywhere.
So Arno, should I just try re-installing the latest tools version of all your tools and just overwrite? I take it your program creates those .xmls automatically?
Getting close I think
Oh, to answer your question I am using Windows 7 Ultimate 64bit and Office 2010 Pro Plus 32bit.