The 64 bit version of this Bentley software requires the "64-bit Access Database Engine" (not included with this Bentley software) to be able to support newer MSOffice file formats which can be used in ModelBuilder and SCADAConnect. If you do not have a compatible version of the Access Database Engine installed and wish to connect to these data sources, either download and install the 64-bit Access Database Engine from Microsoft using the following link: http://www.microsoft.com/en-us/ download/details.aspx?id=13255 or alternatively, use the 32 bit version of the software, which can be accessed from C:\Program Files (x86)\Bentley\<Product Name>\<Product Name>\<Product Name>.exe, which supports these formats without requiring additional components.