I had a small working app in MDB-React and it failed when I upgraded to 4.8.3.  

I used the upgrade procedure I get here a few days ago.  That is:

1. remove mdbreact dependency from project.json

2. npm install

3. add dependency back in

4. npm install again

But now Navigation fails.  The Homepage comes up correctly.  But when I click on a menu item the screen goes completely blank.  I notice that the URL has *not* been modified by the revised path in the NavLink.  e.g. If I click on "Map" with a to="/map" (or "/map/" or "/map/#") the URL is *not* changed it remains the original base URL; e.g. localhost:8000).  If I manually add the path to the base URL in the browser the map page now appears.

Conclusion: something has changed between NavLink and the Router.

Is there I way I can roll back to a previous version?  How do I do that if I'm using the git dependency method of binding to react?