You mention Win7 64 bit, are you running 64 bit NX and 64 bit MSOffice?
The journal basically uses a component of MS Access to read the Excel data.
If NX and MSOffice are both 64 bit, it may just be a matter of changing the connection string to the correct values.
If you are running 64 bit NX and 32 bit MSOffice, you may be out of luck with the strategy this journal uses. Unfortunately, a 64 bit application (your NX journal) can't use the 32 bit component.