If DataCare is not listing Invoices in the list of modules to check, then it either doesn't think that invoices is installed, or doesn't think there is any data for it to check.

To test the former, make a copy of the Invoices sample data \Softrak\Invoices\Samdata\*.sam in another Folder, and point DataCare at the Folder. Invoices should appear in the list of applications to check.

To test the latter, look for files QI*.SAM in the Folder that DataCare is pointing at.

Finally, check the \softrak\DataCare\dicdlls Folder and look for DCE@I90B.DLL. I believe that is the DLL responsible for the Application Integrity Phase Invoices 9.0B.