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 or Word, 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.