You shouldn't have problems with LabVIEW 7.0, it isn't very old. I'm not sure what problems code written to talk to the earlier version of Office might be having. Can you post a sample of the code that doesn't work? If you can use "Save with options" and save it in the Development Distribution. Also zip the resulting ".llb" file to reduce it in size.
P.M.
PutnamCertified LabVIEW Developer
Senior Test Engineer North Shore Technology, Inc.
Currently using LV 2012-LabVIEW 2018, RT8.5

LabVIEW Champion