It seems a basic uninstall and reinstall doesn't wipe the user data. So I had to manually delete the Jaxx folder (found in AppData\Roaming\) and then it worked after entering my backup phrase. As you can see from the image, my full LTC amount is now showing, along with both transaction entries.
Using the built in "Reset Jaxx Cache" option doesn't work so well. You have to do it manually.