Additional steps if switching between versions is required

Rarely, you may want to compare a small number of reports while using different versions of the add-in. If you want to switch between different versions of the add-in then additional steps are required each time you switch.
Caution: 
We recommend that you back up your files before you switch add-ins.
  1. In Excel, open one of the reports.
  2. On the File tab, click the Info section.
  3. Click Check for Issues and select Inspect Document.
  4. Ensure that the Task Pane Add-ins option is selected.
  5. Click Inspect.
  6. Click Remove All in the Task Pane Add-ins section.
  7. Repeat steps 1 to 6 for each report.
  8. Clear the Office cache.
    See https://docs.microsoft.com/en-us/office/dev/add-ins/testing/clear-cache
  9. Open a file and update the add-in.